87731478024 has 128 divisors (see below), whose sum is σ = 235449815040. Its totient is φ = 27176264192.

The previous prime is 87731478017. The next prime is 87731478053. The reversal of 87731478024 is 42087413778.

It is a Cunningham number, because it is equal to 296195²-1.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3541987 + ... + 3566669.

It is an arithmetic number, because the mean of its divisors is an integer number (1839451680).

Almost surely, 2^87731478024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87731478024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117724907520).

87731478024 is an abundant number, since it is smaller than the sum of its proper divisors (147718337016).

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

87731478024 is a wasteful number, since it uses less digits than its factorization.

87731478024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24899 (or 24895 counting only the distinct ones).

The product of its (nonzero) digits is 2107392, while the sum is 51.

The spelling of 87731478024 in words is "eighty-seven billion, seven hundred thirty-one million, four hundred seventy-eight thousand, twenty-four".