80631320 has 128 divisors (see below), whose sum is σ = 231413760. Its totient is φ = 24552960.

The previous prime is 80631319. The next prime is 80631389. The reversal of 80631320 is 2313608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144482 + ... + 145038.

It is an arithmetic number, because the mean of its divisors is an integer number (1807920).

Almost surely, 2^80631320 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 80631320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115706880).

80631320 is an abundant number, since it is smaller than the sum of its proper divisors (150782440).

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

80631320 is a wasteful number, since it uses less digits than its factorization.

80631320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633 (or 629 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 80631320 is about 8979.4944178389. The cubic root of 80631320 is about 432.0174175648.

Adding to 80631320 its reverse (2313608), we get a palindrome (82944928).

The spelling of 80631320 in words is "eighty million, six hundred thirty-one thousand, three hundred twenty".