38903904 has 72 divisors (see below), whose sum is σ = 119154672. Its totient is φ = 11969280.

The previous prime is 38903897. The next prime is 38903933. The reversal of 38903904 is 40930983.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 1452 + ... + 8939.

It is an arithmetic number, because the mean of its divisors is an integer number (1654926).

Almost surely, 2^38903904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38903904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59577336).

38903904 is an abundant number, since it is smaller than the sum of its proper divisors (80250768).

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

38903904 is a wasteful number, since it uses less digits than its factorization.

38903904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10420 (or 10409 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 38903904 is about 6237.2994156125. The cubic root of 38903904 is about 338.8423837207.

The spelling of 38903904 in words is "thirty-eight million, nine hundred three thousand, nine hundred four".