87391170 has 128 divisors (see below), whose sum is σ = 246343680. Its totient is φ = 22014720.

The previous prime is 87391163. The next prime is 87391207. The reversal of 87391170 is 7119378.

87391170 = 1258² + 1259² + ... + 1310².

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 443512 + ... + 443708.

It is an arithmetic number, because the mean of its divisors is an integer number (1924560).

Almost surely, 2^87391170 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87391170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123171840).

87391170 is an abundant number, since it is smaller than the sum of its proper divisors (158952510).

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

87391170 is a wasteful number, since it uses less digits than its factorization.

87391170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 87391170 is about 9348.3244487983. The cubic root of 87391170 is about 443.7678662383.

The spelling of 87391170 in words is "eighty-seven million, three hundred ninety-one thousand, one hundred seventy".