87456644 has 36 divisors (see below), whose sum is σ = 170137968. Its totient is φ = 39010800.

The previous prime is 87456643. The next prime is 87456647. The reversal of 87456644 is 44665478.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 87456595 and 87456604.

It is not an unprimeable number, because it can be changed into a prime (87456643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 152879 + ... + 153449.

Almost surely, 2^87456644 is an apocalyptic number.

It is an amenable number.

87456644 is a deficient number, since it is larger than the sum of its proper divisors (82681324).

87456644 is a wasteful number, since it uses less digits than its factorization.

87456644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704 (or 643 counting only the distinct ones).

The product of its digits is 645120, while the sum is 44.

The square root of 87456644 is about 9351.8257041072. The cubic root of 87456644 is about 443.8786631077.

The spelling of 87456644 in words is "eighty-seven million, four hundred fifty-six thousand, six hundred forty-four".