86887815 has 32 divisors (see below), whose sum is σ = 162763776. Its totient is φ = 38749440.

The previous prime is 86887793. The next prime is 86887837. The reversal of 86887815 is 51878868.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (86887793) and next prime (86887837).

It is not a de Polignac number, because 86887815 - 2⁶ = 86887751 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5787 + ... + 14396.

It is an arithmetic number, because the mean of its divisors is an integer number (5086368).

Almost surely, 2^86887815 is an apocalyptic number.

86887815 is a deficient number, since it is larger than the sum of its proper divisors (75875961).

86887815 is a wasteful number, since it uses less digits than its factorization.

86887815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20239.

The product of its digits is 860160, while the sum is 51.

The square root of 86887815 is about 9321.3633659460. The cubic root of 86887815 is about 442.9142215959.

The spelling of 86887815 in words is "eighty-six million, eight hundred eighty-seven thousand, eight hundred fifteen".