87440091788 has 48 divisors (see below), whose sum is σ = 180682521600. Its totient is φ = 36243101376.

The previous prime is 87440091779. The next prime is 87440091839. The reversal of 87440091788 is 88719004478.

It is a happy 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, 79688 + ... + 425711.

It is an arithmetic number, because the mean of its divisors is an integer number (3764219200).

Almost surely, 2^87440091788 is an apocalyptic number.

It is an amenable number.

87440091788 is an abundant number, since it is smaller than the sum of its proper divisors (93242429812).

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

87440091788 is a wasteful number, since it uses less digits than its factorization.

87440091788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505614 (or 505612 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 56.

The spelling of 87440091788 in words is "eighty-seven billion, four hundred forty million, ninety-one thousand, seven hundred eighty-eight".