87649836 has 24 divisors (see below), whose sum is σ = 204837360. Its totient is φ = 29170752.

The previous prime is 87649823. The next prime is 87649853. The reversal of 87649836 is 63894678.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2730 + ... + 13518.

It is an arithmetic number, because the mean of its divisors is an integer number (8534890).

Almost surely, 2^87649836 is an apocalyptic number.

It is an amenable number.

87649836 is an abundant number, since it is smaller than the sum of its proper divisors (117187524).

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

87649836 is a wasteful number, since it uses less digits than its factorization.

87649836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11473 (or 11471 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 51.

The square root of 87649836 is about 9362.1491122498. The cubic root of 87649836 is about 444.2052658550.

The spelling of 87649836 in words is "eighty-seven million, six hundred forty-nine thousand, eight hundred thirty-six".