87881632 has 24 divisors (see below), whose sum is σ = 176284836. Its totient is φ = 43110912.

The previous prime is 87881609. The next prime is 87881639. The reversal of 87881632 is 23618878.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 87684496 + 197136 = 9364^2 + 444^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87881639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24213 + ... + 27604.

Almost surely, 2^87881632 is an apocalyptic number.

It is an amenable number.

87881632 is an abundant number, since it is smaller than the sum of its proper divisors (88403204).

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

87881632 is a wasteful number, since it uses less digits than its factorization.

87881632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51880 (or 51872 counting only the distinct ones).

The product of its digits is 129024, while the sum is 43.

The square root of 87881632 is about 9374.5203610638. The cubic root of 87881632 is about 444.5964982695.

The spelling of 87881632 in words is "eighty-seven million, eight hundred eighty-one thousand, six hundred thirty-two".