80368640 has 88 divisors (see below), whose sum is σ = 210464352. Its totient is φ = 29204480.

The previous prime is 80368633. The next prime is 80368681. The reversal of 80368640 is 4686308.

It is a tau number, because it is divible by the number of its divisors (88).

It is a self number, because there is not a number n which added to its sum of digits gives 80368640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55607 + ... + 57033.

Almost surely, 2^80368640 is an apocalyptic number.

80368640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80368640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105232176).

80368640 is an abundant number, since it is smaller than the sum of its proper divisors (130095712).

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

80368640 is a wasteful number, since it uses less digits than its factorization.

80368640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1463 (or 1445 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 80368640 is about 8964.8558270616. The cubic root of 80368640 is about 431.5477663478.

The spelling of 80368640 in words is "eighty million, three hundred sixty-eight thousand, six hundred forty".