87686646 has 48 divisors (see below), whose sum is σ = 189578640. Its totient is φ = 27025920.

The previous prime is 87686639. The next prime is 87686689. The reversal of 87686646 is 64668678.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105360 + ... + 106188.

It is an arithmetic number, because the mean of its divisors is an integer number (3949555).

Almost surely, 2^87686646 is an apocalyptic number.

87686646 is an abundant number, since it is smaller than the sum of its proper divisors (101891994).

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

87686646 is a wasteful number, since it uses less digits than its factorization.

87686646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929 (or 912 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 51.

The square root of 87686646 is about 9364.1148006632. The cubic root of 87686646 is about 444.2674409376.

The spelling of 87686646 in words is "eighty-seven million, six hundred eighty-six thousand, six hundred forty-six".