87981532 has 24 divisors (see below), whose sum is σ = 161675136. Its totient is φ = 41812848.

The previous prime is 87981529. The next prime is 87981539. The reversal of 87981532 is 23518978.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87981539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12063 + ... + 17929.

It is an arithmetic number, because the mean of its divisors is an integer number (6736464).

Almost surely, 2^87981532 is an apocalyptic number.

It is an amenable number.

87981532 is a deficient number, since it is larger than the sum of its proper divisors (73693604).

87981532 is a wasteful number, since it uses less digits than its factorization.

87981532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6057 (or 6055 counting only the distinct ones).

The product of its digits is 120960, while the sum is 43.

The square root of 87981532 is about 9379.8471202893. The cubic root of 87981532 is about 444.7649004337.

The spelling of 87981532 in words is "eighty-seven million, nine hundred eighty-one thousand, five hundred thirty-two".