38145915 has 12 divisors (see below), whose sum is σ = 66119664. Its totient is φ = 20344464.

The previous prime is 38145907. The next prime is 38145941. The reversal of 38145915 is 51954183.

It is not a de Polignac number, because 38145915 - 2³ = 38145907 is a prime.

It is a super-2 number, since 2×38145915² = 2910221662374450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 38145915.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 423799 + ... + 423888.

It is an arithmetic number, because the mean of its divisors is an integer number (5509972).

Almost surely, 2^38145915 is an apocalyptic number.

38145915 is a deficient number, since it is larger than the sum of its proper divisors (27973749).

38145915 is a wasteful number, since it uses less digits than its factorization.

38145915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847698 (or 847695 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 38145915 is about 6176.2379325929. The cubic root of 38145915 is about 336.6273091701.

It can be divided in two parts, 38145 and 915, that added together give a triangular number (39060 = T₂₇₉).

The spelling of 38145915 in words is "thirty-eight million, one hundred forty-five thousand, nine hundred fifteen".