87170388 has 36 divisors (see below), whose sum is σ = 210198240. Its totient is φ = 28115760.

The previous prime is 87170381. The next prime is 87170389. The reversal of 87170388 is 88307178.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87170381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7753 + ... + 15311.

It is an arithmetic number, because the mean of its divisors is an integer number (5838840).

Almost surely, 2^87170388 is an apocalyptic number.

It is an amenable number.

87170388 is an abundant number, since it is smaller than the sum of its proper divisors (123027852).

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

87170388 is a wasteful number, since it uses less digits than its factorization.

87170388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7628 (or 7595 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 42.

The square root of 87170388 is about 9336.5083409163. The cubic root of 87170388 is about 443.3938445428.

The spelling of 87170388 in words is "eighty-seven million, one hundred seventy thousand, three hundred eighty-eight".