80756440 has 32 divisors (see below), whose sum is σ = 184420080. Its totient is φ = 31819392.

The previous prime is 80756371. The next prime is 80756447. The reversal of 80756440 is 4465708.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 80756396 and 80756405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80756447) 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 7 ways as a sum of consecutive naturals, for example, 12387 + ... + 17746.

Almost surely, 2^80756440 is an apocalyptic number.

It is an amenable number.

80756440 is an abundant number, since it is smaller than the sum of its proper divisors (103663640).

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

80756440 is a wasteful number, since it uses less digits than its factorization.

80756440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30211 (or 30207 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 80756440 is about 8986.4587018469. The cubic root of 80756440 is about 432.2407637113.

The spelling of 80756440 in words is "eighty million, seven hundred fifty-six thousand, four hundred forty".