84987656 has 32 divisors (see below), whose sum is σ = 175271040. Its totient is φ = 38388288.

The previous prime is 84987649. The next prime is 84987659. The reversal of 84987656 is 65678948.

It is a junction number, because it is equal to n+sod(n) for n = 84987598 and 84987607.

It is not an unprimeable number, because it can be changed into a prime (84987659) 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, 3806 + ... + 13581.

It is an arithmetic number, because the mean of its divisors is an integer number (5477220).

Almost surely, 2^84987656 is an apocalyptic number.

It is an amenable number.

84987656 is an abundant number, since it is smaller than the sum of its proper divisors (90283384).

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

84987656 is a wasteful number, since it uses less digits than its factorization.

84987656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17453 (or 17449 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 53.

The square root of 84987656 is about 9218.8749855934. The cubic root of 84987656 is about 439.6616820813.

The spelling of 84987656 in words is "eighty-four million, nine hundred eighty-seven thousand, six hundred fifty-six".