86871015 has 128 divisors (see below), whose sum is σ = 197130240. Its totient is φ = 35251200.

The previous prime is 86870999. The next prime is 86871047. The reversal of 86871015 is 51017868.

It is not a de Polignac number, because 86871015 - 2⁴ = 86870999 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 634027 + ... + 634163.

It is an arithmetic number, because the mean of its divisors is an integer number (1540080).

Almost surely, 2^86871015 is an apocalyptic number.

86871015 is an abundant number, since it is smaller than the sum of its proper divisors (110259225).

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

86871015 is a wasteful number, since it uses less digits than its factorization.

86871015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The square root of 86871015 is about 9320.4621666525. The cubic root of 86871015 is about 442.8856735249.

The spelling of 86871015 in words is "eighty-six million, eight hundred seventy-one thousand, fifteen".