77887552 has 28 divisors (see below), whose sum is σ = 157185360. Its totient is φ = 38281856.

The previous prime is 77887529. The next prime is 77887561. The reversal of 77887552 is 25578877.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 77887496 and 77887505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6538 + ... + 14089.

Almost surely, 2^77887552 is an apocalyptic number.

It is an amenable number.

77887552 is an abundant number, since it is smaller than the sum of its proper divisors (79297808).

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

77887552 is a wasteful number, since it uses less digits than its factorization.

77887552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20698 (or 20688 counting only the distinct ones).

The product of its digits is 1097600, while the sum is 49.

The square root of 77887552 is about 8825.3924558628. The cubic root of 77887552 is about 427.0604480893.

The spelling of 77887552 in words is "seventy-seven million, eight hundred eighty-seven thousand, five hundred fifty-two".