87688772 has 6 divisors (see below), whose sum is σ = 153455358. Its totient is φ = 43844384.

The previous prime is 87688759. The next prime is 87688787. The reversal of 87688772 is 27788678.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 87347716 + 341056 = 9346^2 + 584^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10961093 + ... + 10961100.

It is an arithmetic number, because the mean of its divisors is an integer number (25575893).

Almost surely, 2^87688772 is an apocalyptic number.

It is an amenable number.

87688772 is a deficient number, since it is larger than the sum of its proper divisors (65766586).

87688772 is a wasteful number, since it uses less digits than its factorization.

87688772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21922197 (or 21922195 counting only the distinct ones).

The product of its digits is 2107392, while the sum is 53.

The square root of 87688772 is about 9364.2283184467. The cubic root of 87688772 is about 444.2710313929.

The spelling of 87688772 in words is "eighty-seven million, six hundred eighty-eight thousand, seven hundred seventy-two".