87170642 has 16 divisors (see below), whose sum is σ = 140978880. Its totient is φ = 40185552.

The previous prime is 87170627. The next prime is 87170669. The reversal of 87170642 is 24607178.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31403 + ... + 34065.

It is an arithmetic number, because the mean of its divisors is an integer number (8811180).

Almost surely, 2^87170642 is an apocalyptic number.

87170642 is a deficient number, since it is larger than the sum of its proper divisors (53808238).

87170642 is a wasteful number, since it uses less digits than its factorization.

87170642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3937.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 87170642 is about 9336.5219434220. The cubic root of 87170642 is about 443.3942752010.

The spelling of 87170642 in words is "eighty-seven million, one hundred seventy thousand, six hundred forty-two".