80931312 has 200 divisors, whose sum is σ = 292397952. Its totient is φ = 20995200.

The previous prime is 80931311. The next prime is 80931329. The reversal of 80931312 is 21313908.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80931311) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 99387 + ... + 100197.

Almost surely, 2^80931312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80931312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146198976).

80931312 is an abundant number, since it is smaller than the sum of its proper divisors (211466640).

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

80931312 is a wasteful number, since it uses less digits than its factorization.

80931312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849 (or 834 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 80931312 is about 8996.1831906648. The cubic root of 80931312 is about 432.5525337414.

The spelling of 80931312 in words is "eighty million, nine hundred thirty-one thousand, three hundred twelve".