80729808 has 20 divisors (see below), whose sum is σ = 208552128. Its totient is φ = 26909920.

The previous prime is 80729807. The next prime is 80729809. The reversal of 80729808 is 80892708.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (80729807) and next prime (80729809).

It is a self number, because there is not a number n which added to its sum of digits gives 80729808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80729807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840888 + ... + 840983.

Almost surely, 2^80729808 is an apocalyptic number.

It is an amenable number.

80729808 is an abundant number, since it is smaller than the sum of its proper divisors (127822320).

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

80729808 is a wasteful number, since it uses less digits than its factorization.

80729808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1681882 (or 1681876 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 80729808 is about 8984.9767946278. The cubic root of 80729808 is about 432.1932434489.

The spelling of 80729808 in words is "eighty million, seven hundred twenty-nine thousand, eight hundred eight".