87457644 has 36 divisors (see below), whose sum is σ = 229263944. Its totient is φ = 29152224.

The previous prime is 87457631. The next prime is 87457651. The reversal of 87457644 is 44675478.

87457644 is a `hidden beast` number, since 8 + 74 + 576 + 4 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 87457644.

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, 44017 + ... + 45960.

Almost surely, 2^87457644 is an apocalyptic number.

It is an amenable number.

87457644 is an abundant number, since it is smaller than the sum of its proper divisors (141806300).

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

87457644 is a wasteful number, since it uses less digits than its factorization.

87457644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89996 (or 89982 counting only the distinct ones).

The product of its digits is 752640, while the sum is 45.

The square root of 87457644 is about 9351.8791694504. The cubic root of 87457644 is about 443.8803549059.

The spelling of 87457644 in words is "eighty-seven million, four hundred fifty-seven thousand, six hundred forty-four".