87857715 has 32 divisors (see below), whose sum is σ = 153778176. Its totient is φ = 42479360.

The previous prime is 87857713. The next prime is 87857747. The reversal of 87857715 is 51775878.

It is a happy number.

It is not a de Polignac number, because 87857715 - 2¹ = 87857713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87857713) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101374 + ... + 102236.

It is an arithmetic number, because the mean of its divisors is an integer number (4805568).

Almost surely, 2^87857715 is an apocalyptic number.

87857715 is a deficient number, since it is larger than the sum of its proper divisors (65920461).

87857715 is a wasteful number, since it uses less digits than its factorization.

87857715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499.

The product of its digits is 548800, while the sum is 48.

The square root of 87857715 is about 9373.2446356638. The cubic root of 87857715 is about 444.5561622745.

The spelling of 87857715 in words is "eighty-seven million, eight hundred fifty-seven thousand, seven hundred fifteen".