38821904 has 20 divisors (see below), whose sum is σ = 82055760. Its totient is φ = 17646240.

The previous prime is 38821891. The next prime is 38821927. The reversal of 38821904 is 40912883.

It is a happy number.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110114 + ... + 110465.

It is an arithmetic number, because the mean of its divisors is an integer number (4102788).

Almost surely, 2^38821904 is an apocalyptic number.

It is an amenable number.

38821904 is an abundant number, since it is smaller than the sum of its proper divisors (43233856).

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

38821904 is a wasteful number, since it uses less digits than its factorization.

38821904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220598 (or 220592 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 38821904 is about 6230.7225905187. The cubic root of 38821904 is about 338.6041503910.

The spelling of 38821904 in words is "thirty-eight million, eight hundred twenty-one thousand, nine hundred four".