904788394020 has 384 divisors, whose sum is σ = 3255561953280. Its totient is φ = 204340631040.

The previous prime is 904788393989. The next prime is 904788394033. The reversal of 904788394020 is 20493887409.

904788394020 is a `hidden beast` number, since 9 + 0 + 478 + 83 + 94 + 0 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 191163574 + ... + 191168306.

It is an arithmetic number, because the mean of its divisors is an integer number (8478025920).

Almost surely, 2^904788394020 is an apocalyptic number.

904788394020 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 904788394020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1627780976640).

904788394020 is an abundant number, since it is smaller than the sum of its proper divisors (2350773559260).

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

904788394020 is a wasteful number, since it uses less digits than its factorization.

904788394020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5352 (or 5344 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 904788394020 in words is "nine hundred four billion, seven hundred eighty-eight million, three hundred ninety-four thousand, twenty".