87015878 has 16 divisors (see below), whose sum is σ = 131729280. Its totient is φ = 43108416.

The previous prime is 87015871. The next prime is 87015881. The reversal of 87015878 is 87851078.

It is a super-2 number, since 2×87015878² = 15143526048221768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87015871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143051 + ... + 143657.

It is an arithmetic number, because the mean of its divisors is an integer number (8233080).

Almost surely, 2^87015878 is an apocalyptic number.

87015878 is a deficient number, since it is larger than the sum of its proper divisors (44713402).

87015878 is a wasteful number, since it uses less digits than its factorization.

87015878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151.

The product of its (nonzero) digits is 125440, while the sum is 44.

The square root of 87015878 is about 9328.2301643988. The cubic root of 87015878 is about 443.1317169182.

The spelling of 87015878 in words is "eighty-seven million, fifteen thousand, eight hundred seventy-eight".