27997985304 has 96 divisors (see below), whose sum is σ = 80372373120. Its totient is φ = 8774489088.

The previous prime is 27997985297. The next prime is 27997985311. The reversal of 27997985304 is 40358979972.

27997985304 is a `hidden beast` number, since 2 + 7 + 9 + 9 + 7 + 98 + 530 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (27997985297) and next prime (27997985311).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1208857 + ... + 1231799.

It is an arithmetic number, because the mean of its divisors is an integer number (837212220).

Almost surely, 2^27997985304 is an apocalyptic number.

27997985304 is a gapful number since it is divisible by the number (24) 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 27997985304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40186186560).

27997985304 is an abundant number, since it is smaller than the sum of its proper divisors (52374387816).

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

27997985304 is a wasteful number, since it uses less digits than its factorization.

27997985304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23969 (or 23962 counting only the distinct ones).

The product of its (nonzero) digits is 34292160, while the sum is 63.

The spelling of 27997985304 in words is "twenty-seven billion, nine hundred ninety-seven million, nine hundred eighty-five thousand, three hundred four".