80591868 has 144 divisors (see below), whose sum is σ = 247124640. Its totient is φ = 22643712.

The previous prime is 80591851. The next prime is 80591873. The reversal of 80591868 is 86819508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 513246 + ... + 513402.

Almost surely, 2^80591868 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 80591868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123562320).

80591868 is an abundant number, since it is smaller than the sum of its proper divisors (166532772).

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

80591868 is a wasteful number, since it uses less digits than its factorization.

80591868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 80591868 is about 8977.2973661342. The cubic root of 80591868 is about 431.9469456451.

The spelling of 80591868 in words is "eighty million, five hundred ninety-one thousand, eight hundred sixty-eight".