80691930 has 128 divisors (see below), whose sum is σ = 237945600. Its totient is φ = 19296000.

The previous prime is 80691901. The next prime is 80691953. The reversal of 80691930 is 3919608.

It is a super-2 number, since 2×80691930² = 13022375134249800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 299836 + ... + 300104.

It is an arithmetic number, because the mean of its divisors is an integer number (1858950).

Almost surely, 2^80691930 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80691930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118972800).

80691930 is an abundant number, since it is smaller than the sum of its proper divisors (157253670).

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

80691930 is a wasteful number, since it uses less digits than its factorization.

80691930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 80691930 is about 8982.8686954669. The cubic root of 80691930 is about 432.1256386113.

It can be divided in two parts, 8069 and 1930, that added together give a palindrome (9999).

The spelling of 80691930 in words is "eighty million, six hundred ninety-one thousand, nine hundred thirty".