904021900 has 144 divisors (see below), whose sum is σ = 2184860160. Its totient is φ = 323136000.

The previous prime is 904021897. The next prime is 904021927. The reversal of 904021900 is 9120409.

904021900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×904021900² = 1634511191359220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5986825 + ... + 5986975.

It is an arithmetic number, because the mean of its divisors is an integer number (15172640).

Almost surely, 2^904021900 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 904021900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1092430080).

904021900 is an abundant number, since it is smaller than the sum of its proper divisors (1280838260).

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

904021900 is a wasteful number, since it uses less digits than its factorization.

904021900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 904021900 is about 30066.9569461228. The cubic root of 904021900 is about 966.9254334330.

The spelling of 904021900 in words is "nine hundred four million, twenty-one thousand, nine hundred".