38918904 has 16 divisors (see below), whose sum is σ = 97297320. Its totient is φ = 12972960.

The previous prime is 38918903. The next prime is 38918911. The reversal of 38918904 is 40981983.

It is a super-2 number, since 2×38918904² = 3029362177122432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38918903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 810787 + ... + 810834.

Almost surely, 2^38918904 is an apocalyptic number.

It is an amenable number.

38918904 is an abundant number, since it is smaller than the sum of its proper divisors (58378416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38918904 is a wasteful number, since it uses less digits than its factorization.

38918904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1621630 (or 1621626 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 38918904 is about 6238.5017432073. The cubic root of 38918904 is about 338.8859267600.

The spelling of 38918904 in words is "thirty-eight million, nine hundred eighteen thousand, nine hundred four".