38681916 has 48 divisors (see below), whose sum is σ = 111089664. Its totient is φ = 10201536.

The previous prime is 38681899. The next prime is 38681917. The reversal of 38681916 is 61918683.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38681917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16620 + ... + 18803.

It is an arithmetic number, because the mean of its divisors is an integer number (2314368).

Almost surely, 2^38681916 is an apocalyptic number.

It is an amenable number.

38681916 is an abundant number, since it is smaller than the sum of its proper divisors (72407748).

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

38681916 is a wasteful number, since it uses less digits than its factorization.

38681916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35450 (or 35448 counting only the distinct ones).

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

The square root of 38681916 is about 6219.4787562946. The cubic root of 38681916 is about 338.1966690364.

The spelling of 38681916 in words is "thirty-eight million, six hundred eighty-one thousand, nine hundred sixteen".