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Properties of the Number 28123

Twenty-Eight Thousand One Hundred Twenty-Three

Basics

Value: 28122 → 28123 → 28124

Parity: odd

Prime: Yes

Previous Prime: 28111

Next Prime: 28151

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 28123

Divisors: 1, 28123

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110110111011011

Octal: 66733

Duodecimal: 14337

Hexadecimal: 6ddb

Square: 790903129

Square Root: 167.69913535853428

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

State of one-dimensional cellular automaton 'σ' (Rule 150): 000,001,010,011,100,101,110,111 -> 0,1,1,0,1,0,0,1 at generation n, converted to a decimal number. A38184
Number of conjugacy classes in the symmetric group Sn with distinct cardinality. A73906
Positive integer values of n such that 6·n2-5 is a square. A80806
a(1)=1, a(n) = a(n-1) + sum of odd numbers which are among the first (n-1) terms of the sequence. A131093
Family 1 "Rule 90·Rule 150 Array" read by antidiagonals. A48710
a(n)*a(n+3) - a(n+1)*a(n+2) = 5, given a(0)=a(1)=1, a(2)=3. A80874
Primes p such that q-p = 28, where q is the next prime after p. A124595
Capped binary boundary codes for holeless strictly non-overlapping polyhexes (all orientations and rotations included). A258002
Capped binary boundary codes for fusenes (all orientations and rotations included). A258012
a(n) is the n-th prime whose decimal expansion begins with the decimal expansion of n. A77345