27987295960 has 64 divisors (see below), whose sum is σ = 68473903680. Its totient is φ = 10233423360.

The previous prime is 27987295933. The next prime is 27987295979. The reversal of 27987295960 is 6959278972.

It is a junction number, because it is equal to n+sod(n) for n = 27987295892 and 27987295901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207711 + ... + 314830.

It is an arithmetic number, because the mean of its divisors is an integer number (1069904745).

Almost surely, 2^27987295960 is an apocalyptic number.

27987295960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27987295960 is an abundant number, since it is smaller than the sum of its proper divisors (40486607720).

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

27987295960 is a wasteful number, since it uses less digits than its factorization.

27987295960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522668 (or 522664 counting only the distinct ones).

The product of its (nonzero) digits is 34292160, while the sum is 64.

The spelling of 27987295960 in words is "twenty-seven billion, nine hundred eighty-seven million, two hundred ninety-five thousand, nine hundred sixty".