80987056 has 20 divisors (see below), whose sum is σ = 157739904. Its totient is φ = 40280000.

The previous prime is 80987047. The next prime is 80987057. The reversal of 80987056 is 65078908.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (80987057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10195 + ... + 16306.

Almost surely, 2^80987056 is an apocalyptic number.

It is an amenable number.

80987056 is a deficient number, since it is larger than the sum of its proper divisors (76752848).

80987056 is a wasteful number, since it uses less digits than its factorization.

80987056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26700 (or 26694 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 80987056 is about 8999.2808601577. The cubic root of 80987056 is about 432.6518223602.

The spelling of 80987056 in words is "eighty million, nine hundred eighty-seven thousand, fifty-six".