80691320 has 16 divisors (see below), whose sum is σ = 181555560. Its totient is φ = 32276512.

The previous prime is 80691319. The next prime is 80691323. The reversal of 80691320 is 2319608.

It is a super-2 number, since 2×80691320² = 13022178246684800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80691323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1008602 + ... + 1008681.

Almost surely, 2^80691320 is an apocalyptic number.

It is an amenable number.

80691320 is an abundant number, since it is smaller than the sum of its proper divisors (100864240).

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

80691320 is a wasteful number, since it uses less digits than its factorization.

80691320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2017294 (or 2017290 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 80691320 is about 8982.8347418841. The cubic root of 80691320 is about 432.1245497073.

The spelling of 80691320 in words is "eighty million, six hundred ninety-one thousand, three hundred twenty".