87070172 has 12 divisors (see below), whose sum is σ = 174140400. Its totient is φ = 37315776.

The previous prime is 87070169. The next prime is 87070177. The reversal of 87070172 is 27107078.

87070172 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87070177) 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, 1554797 + ... + 1554852.

It is an arithmetic number, because the mean of its divisors is an integer number (14511700).

Almost surely, 2^87070172 is an apocalyptic number.

It is an amenable number.

87070172 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.

87070172 is a wasteful number, since it uses less digits than its factorization.

87070172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3109660 (or 3109658 counting only the distinct ones).

The product of its (nonzero) digits is 5488, while the sum is 32.

The square root of 87070172 is about 9331.1399089286. The cubic root of 87070172 is about 443.2238625194.

The spelling of 87070172 in words is "eighty-seven million, seventy thousand, one hundred seventy-two".