Properties of the Number 72490

Seventy-Two Thousand Four Hundred Ninety

Basics

Value: 72489 → 72490 → 72491

Parity: even

Prime: No

Previous Prime: 72481

Next Prime: 72493

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 5 × 11 × 659

Divisors: 1, 2, 5, 10, 11, 22, 55, 110, 659, 1318

Polygonal

Triangular: No

Square: No

Pentagonal: Yes

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001101100101010

Octal: 215452

Duodecimal: 35B4A

Hexadecimal: 11b2a

Square: 5254800100

Square Root: 269.23967018253455

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

Number of n-celled polyominoes without holes, symmetric about axis 2. A56880

Triangle T(n,k), n>=0, 0<=k<=C(n,2), read by rows: T(n,k) = number of k-length chains in the poset of Dyck paths of semilength n ordered by inclusion. A193629

Triangle T(n,k) read by rows: coefficients of polynomials P_n(t) defined in Formula section. A287030

Pentagonal numbers for which both the sum of the digits and the product of the digits are pentagonal numbers. A117711

Pentagonal numbers for which the sum of the digits is also a pentagonal number. A117709

Pentagonal numbers which are products of four distinct primes. A381919

Number of squarefree numbers (excluding 1) less than n. A72490