87212724 has 24 divisors (see below), whose sum is σ = 203817600. Its totient is φ = 29025024.

The previous prime is 87212707. The next prime is 87212789. The reversal of 87212724 is 42721278.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2677 + ... + 13475.

It is an arithmetic number, because the mean of its divisors is an integer number (8492400).

Almost surely, 2^87212724 is an apocalyptic number.

It is an amenable number.

87212724 is an abundant number, since it is smaller than the sum of its proper divisors (116604876).

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

87212724 is a wasteful number, since it uses less digits than its factorization.

87212724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11479 (or 11477 counting only the distinct ones).

The product of its digits is 12544, while the sum is 33.

The square root of 87212724 is about 9338.7752944377. The cubic root of 87212724 is about 443.4656138830.

The spelling of 87212724 in words is "eighty-seven million, two hundred twelve thousand, seven hundred twenty-four".