80987756 has 12 divisors (see below), whose sum is σ = 142159080. Its totient is φ = 40370880.

The previous prime is 80987741. The next prime is 80987827. The reversal of 80987756 is 65778908.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29261 + ... + 31908.

It is an arithmetic number, because the mean of its divisors is an integer number (11846590).

Almost surely, 2^80987756 is an apocalyptic number.

It is an amenable number.

80987756 is a deficient number, since it is larger than the sum of its proper divisors (61171324).

80987756 is a wasteful number, since it uses less digits than its factorization.

80987756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61504 (or 61502 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 50.

The square root of 80987756 is about 8999.3197520702. The cubic root of 80987756 is about 432.6530688779.

The spelling of 80987756 in words is "eighty million, nine hundred eighty-seven thousand, seven hundred fifty-six".