38978418 has 16 divisors (see below), whose sum is σ = 78527520. Its totient is φ = 12897696.

The previous prime is 38978417. The next prime is 38978447. The reversal of 38978418 is 81487983.

It is not an unprimeable number, because it can be changed into a prime (38978411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22888 + ... + 24531.

It is an arithmetic number, because the mean of its divisors is an integer number (4907970).

Almost surely, 2^38978418 is an apocalyptic number.

38978418 is an abundant number, since it is smaller than the sum of its proper divisors (39549102).

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

38978418 is a wasteful number, since it uses less digits than its factorization.

38978418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47561.

The product of its digits is 387072, while the sum is 48.

The square root of 38978418 is about 6243.2698163703. The cubic root of 38978418 is about 339.0585779509.

The spelling of 38978418 in words is "thirty-eight million, nine hundred seventy-eight thousand, four hundred eighteen".