38128531 has 8 divisors (see below), whose sum is σ = 43640064. Its totient is φ = 32633160.

The previous prime is 38128523. The next prime is 38128553. The reversal of 38128531 is 13582183.

38128531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 38128531 - 2³ = 38128523 is a prime.

It is a super-2 number, since 2×38128531² = 2907569752435922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38128493 and 38128502.

It is not an unprimeable number, because it can be changed into a prime (38128031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1536 + ... + 8866.

It is an arithmetic number, because the mean of its divisors is an integer number (5455008).

Almost surely, 2^38128531 is an apocalyptic number.

38128531 is a deficient number, since it is larger than the sum of its proper divisors (5511533).

38128531 is an equidigital number, since it uses as much as digits as its factorization.

38128531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8081.

The product of its digits is 5760, while the sum is 31.

The square root of 38128531 is about 6174.8304430162. The cubic root of 38128531 is about 336.5761650452.

The spelling of 38128531 in words is "thirty-eight million, one hundred twenty-eight thousand, five hundred thirty-one".