Properties of the Number 38158

Thirty-Eight Thousand One Hundred Fifty-Eight

Basics

Value: 38157 → 38158 → 38159

Parity: even

Prime: No

Previous Prime: 38153

Next Prime: 38167

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 × 19079

Divisors: 1, 2, 19079, 38158

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1001010100001110

Octal: 112416

Duodecimal: 1A0BA

Hexadecimal: 950e

Square: 1456032964

Square Root: 195.3407279601466

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 integer partitions of n whose run-lengths are neither weakly increasing nor weakly decreasing. A332641

Integers j not of form 3m+2 such that for any integer k > 0, j·10^k+1 has a divisor in the set { 7, 11, 13, 37 }. A243969

Expansion of g.f. A(x) satisfying A(x) = (1 + x·A(x)) * (1 + 3·x*A(x)²). A375434

Indices where the cumulative sum of cos(2k+1)^2k+1 reaches a record high value. A389559

0-sequence of reduction of tetrahedral number sequence by x² -> x+1. A192246

G.f.: A(x) = exp(sum(n>=1, A084250(n)*xⁿ/n)), where A084250 lists the least distinct positive integers that allow A(x) to be an integer power series. A84251

a(n) = (n!/2)*Sum(1/k!, k=1..n-2). A38158

Number of matchings in graph C₈ X P_n. A33520

a(n) is the numerator of the expected number of restarts in the procedure described in A372422 if repeated until a single person has been selected. A372932