80989904 has 20 divisors (see below), whose sum is σ = 166148964. Its totient is φ = 38112768.

The previous prime is 80989901. The next prime is 80989933. The reversal of 80989904 is 40998908.

It can be written as a sum of positive squares in 2 ways, for example, as 29724304 + 51265600 = 5452^2 + 7160^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80989901) 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, 148607 + ... + 149150.

Almost surely, 2^80989904 is an apocalyptic number.

It is an amenable number.

80989904 is an abundant number, since it is smaller than the sum of its proper divisors (85159060).

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

80989904 is a wasteful number, since it uses less digits than its factorization.

80989904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297782 (or 297776 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 80989904 is about 8999.4390936324. The cubic root of 80989904 is about 432.6568938618.

The spelling of 80989904 in words is "eighty million, nine hundred eighty-nine thousand, nine hundred four".