87664432 has 10 divisors (see below), whose sum is σ = 169849868. Its totient is φ = 43832208.

The previous prime is 87664399. The next prime is 87664439. The reversal of 87664432 is 23446678.

It is a happy number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (87664439) by changing a digit.

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

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2739498 + ... + 2739529.

Almost surely, 2^87664432 is an apocalyptic number.

It is an amenable number.

87664432 is a deficient number, since it is larger than the sum of its proper divisors (82185436).

87664432 is a wasteful number, since it uses less digits than its factorization.

87664432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5479035 (or 5479029 counting only the distinct ones).

The product of its digits is 193536, while the sum is 40.

The square root of 87664432 is about 9362.9286016716. The cubic root of 87664432 is about 444.2299217680.

The spelling of 87664432 in words is "eighty-seven million, six hundred sixty-four thousand, four hundred thirty-two".