80995280 has 40 divisors (see below), whose sum is σ = 189140424. Its totient is φ = 32256000.

The previous prime is 80995279. The next prime is 80995319. The reversal of 80995280 is 8259908.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2637376 + 78357904 = 1624^2 + 8852^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a nialpdrome in base 14.

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, 17180 + ... + 21380.

Almost surely, 2^80995280 is an apocalyptic number.

80995280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80995280 is an abundant number, since it is smaller than the sum of its proper divisors (108145144).

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

80995280 is a wasteful number, since it uses less digits than its factorization.

80995280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4455 (or 4449 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 80995280 is about 8999.7377739576. The cubic root of 80995280 is about 432.6664667093. Note that the first 3 decimals are identical.

The spelling of 80995280 in words is "eighty million, nine hundred ninety-five thousand, two hundred eighty".