87394972 has 12 divisors (see below), whose sum is σ = 174790000. Its totient is φ = 37454976.

The previous prime is 87394961. The next prime is 87394973. The reversal of 87394972 is 27949378.

87394972 is an admirable number.

It is a super-2 number, since 2×87394972² = 15275762261761568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87394973) by changing a digit.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1560597 + ... + 1560652.

Almost surely, 2^87394972 is an apocalyptic number.

It is an amenable number.

87394972 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

87394972 is a wasteful number, since it uses less digits than its factorization.

87394972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3121260 (or 3121258 counting only the distinct ones).

The product of its digits is 762048, while the sum is 49.

The square root of 87394972 is about 9348.5277985360. The cubic root of 87394972 is about 443.7743015984.

The spelling of 87394972 in words is "eighty-seven million, three hundred ninety-four thousand, nine hundred seventy-two".