80785280 has 32 divisors (see below), whose sum is σ = 193128840. Its totient is φ = 32313856.

The previous prime is 80785279. The next prime is 80785297. The reversal of 80785280 is 8258708.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×80785280² = 13052522929356800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62474 + ... + 63753.

Almost surely, 2^80785280 is an apocalyptic number.

80785280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80785280 is an abundant number, since it is smaller than the sum of its proper divisors (112343560).

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

80785280 is a wasteful number, since it uses less digits than its factorization.

80785280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126246 (or 126234 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 38.

The square root of 80785280 is about 8988.0631951494. The cubic root of 80785280 is about 432.2922119920.

The spelling of 80785280 in words is "eighty million, seven hundred eighty-five thousand, two hundred eighty".