87170740 has 24 divisors (see below), whose sum is σ = 183244320. Its totient is φ = 34832928.

The previous prime is 87170737. The next prime is 87170749. The reversal of 87170740 is 4707178.

It is a junction number, because it is equal to n+sod(n) for n = 87170696 and 87170705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87170749) 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 7 ways as a sum of consecutive naturals, for example, 28191 + ... + 31129.

It is an arithmetic number, because the mean of its divisors is an integer number (7635180).

Almost surely, 2^87170740 is an apocalyptic number.

It is an amenable number.

87170740 is an abundant number, since it is smaller than the sum of its proper divisors (96073580).

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

87170740 is a wasteful number, since it uses less digits than its factorization.

87170740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4431 (or 4429 counting only the distinct ones).

The product of its (nonzero) digits is 10976, while the sum is 34.

The square root of 87170740 is about 9336.5271916275. The cubic root of 87170740 is about 443.3944413602.

The spelling of 87170740 in words is "eighty-seven million, one hundred seventy thousand, seven hundred forty".