87940474272 has 72 divisors (see below), whose sum is σ = 285806547936. Its totient is φ = 25125849216.

The previous prime is 87940474261. The next prime is 87940474273. The reversal of 87940474272 is 27247404978.

87940474272 is a `hidden beast` number, since 87 + 94 + 0 + 474 + 2 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (87940474273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21808618 + ... + 21812649.

It is an arithmetic number, because the mean of its divisors is an integer number (3969535388).

Almost surely, 2^87940474272 is an apocalyptic number.

It is an amenable number.

87940474272 is an abundant number, since it is smaller than the sum of its proper divisors (197866073664).

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

87940474272 is a wasteful number, since it uses less digits than its factorization.

87940474272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43621290 (or 43621279 counting only the distinct ones).

The product of its (nonzero) digits is 6322176, while the sum is 54.

The spelling of 87940474272 in words is "eighty-seven billion, nine hundred forty million, four hundred seventy-four thousand, two hundred seventy-two".