87128392704 has 88 divisors (see below), whose sum is σ = 233023929600. Its totient is φ = 28943376384.

The previous prime is 87128392697. The next prime is 87128392711. The reversal of 87128392704 is 40729382178.

It is an interprime number because it is at equal distance from previous prime (87128392697) and next prime (87128392711).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 851697 + ... + 948495.

It is an arithmetic number, because the mean of its divisors is an integer number (2647999200).

Almost surely, 2^87128392704 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 87128392704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116511964800).

87128392704 is an abundant number, since it is smaller than the sum of its proper divisors (145895536896).

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

87128392704 is a wasteful number, since it uses less digits than its factorization.

87128392704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97115 (or 97097 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 51.

The spelling of 87128392704 in words is "eighty-seven billion, one hundred twenty-eight million, three hundred ninety-two thousand, seven hundred four".