27985313904 has 40 divisors (see below), whose sum is σ = 72576731280. Its totient is φ = 9292136448.

The previous prime is 27985313903. The next prime is 27985313947. The reversal of 27985313904 is 40931358972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27985313903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1121959 + ... + 1146630.

It is an arithmetic number, because the mean of its divisors is an integer number (1814418282).

Almost surely, 2^27985313904 is an apocalyptic number.

27985313904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

27985313904 is an abundant number, since it is smaller than the sum of its proper divisors (44591417376).

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

27985313904 is a wasteful number, since it uses less digits than its factorization.

27985313904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2268857 (or 2268851 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 51.

The spelling of 27985313904 in words is "twenty-seven billion, nine hundred eighty-five million, three hundred thirteen thousand, nine hundred four".