87026628978 has 24 divisors (see below), whose sum is σ = 188652383868. Its totient is φ = 28994308992.

The previous prime is 87026628947. The next prime is 87026629031. The reversal of 87026628978 is 87982662078.

It can be written as a sum of positive squares in 2 ways, for example, as 69251606649 + 17775022329 = 263157^2 + 133323^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1177075 + ... + 1248822.

Almost surely, 2^87026628978 is an apocalyptic number.

87026628978 is an abundant number, since it is smaller than the sum of its proper divisors (101625754890).

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

87026628978 is a wasteful number, since it uses less digits than its factorization.

87026628978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2427898 (or 2427895 counting only the distinct ones).

The product of its (nonzero) digits is 32514048, while the sum is 63.

The spelling of 87026628978 in words is "eighty-seven billion, twenty-six million, six hundred twenty-eight thousand, nine hundred seventy-eight".