285904839120 has 80 divisors (see below), whose sum is σ = 898788223872. Its totient is φ = 75167464960.

The previous prime is 285904839097. The next prime is 285904839127. The reversal of 285904839120 is 21938409582.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285904839127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8372187 + ... + 8406266.

Almost surely, 2^285904839120 is an apocalyptic number.

285904839120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285904839120 is an abundant number, since it is smaller than the sum of its proper divisors (612883384752).

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

285904839120 is a wasteful number, since it uses less digits than its factorization.

285904839120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16778540 (or 16778534 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 51.

The spelling of 285904839120 in words is "two hundred eighty-five billion, nine hundred four million, eight hundred thirty-nine thousand, one hundred twenty".