904997638 has 8 divisors (see below), whose sum is σ = 1373852088. Its totient is φ = 447046944.

The previous prime is 904997623. The next prime is 904997641. The reversal of 904997638 is 836799409.

904997638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 2725731 + ... + 2726062.

It is an arithmetic number, because the mean of its divisors is an integer number (171731511).

Almost surely, 2^904997638 is an apocalyptic number.

904997638 is a deficient number, since it is larger than the sum of its proper divisors (468854450).

904997638 is a wasteful number, since it uses less digits than its factorization.

904997638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5451878.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The square root of 904997638 is about 30083.1786551887. The cubic root of 904997638 is about 967.2731855745.

The spelling of 904997638 in words is "nine hundred four million, nine hundred ninety-seven thousand, six hundred thirty-eight".