87312252 has 12 divisors (see below), whose sum is σ = 203728616. Its totient is φ = 29104080.

The previous prime is 87312241. The next prime is 87312257. The reversal of 87312252 is 25221378.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) 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 (87312257) 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, 3637999 + ... + 3638022.

Almost surely, 2^87312252 is an apocalyptic number.

It is an amenable number.

87312252 is an abundant number, since it is smaller than the sum of its proper divisors (116416364).

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

87312252 is a wasteful number, since it uses less digits than its factorization.

87312252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7276028 (or 7276026 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 87312252 is about 9344.1025251225. The cubic root of 87312252 is about 443.6342454935.

The spelling of 87312252 in words is "eighty-seven million, three hundred twelve thousand, two hundred fifty-two".