87645392 has 10 divisors (see below), whose sum is σ = 169812978. Its totient is φ = 43822688.

The previous prime is 87645359. The next prime is 87645403. The reversal of 87645392 is 29354678.

It can be written as a sum of positive squares in only one way, i.e., 82373776 + 5271616 = 9076^2 + 2296^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2738903 + ... + 2738934.

Almost surely, 2^87645392 is an apocalyptic number.

It is an amenable number.

87645392 is a deficient number, since it is larger than the sum of its proper divisors (82167586).

87645392 is a wasteful number, since it uses less digits than its factorization.

87645392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5477845 (or 5477839 counting only the distinct ones).

The product of its digits is 362880, while the sum is 44.

The square root of 87645392 is about 9361.9117705734. The cubic root of 87645392 is about 444.1977584001.

The spelling of 87645392 in words is "eighty-seven million, six hundred forty-five thousand, three hundred ninety-two".