80978404 has 24 divisors (see below), whose sum is σ = 153099128. Its totient is φ = 37255680.

The previous prime is 80978393. The next prime is 80978419. The reversal of 80978404 is 40487908.

It can be written as a sum of positive squares in 4 ways, for example, as 14400 + 80964004 = 120^2 + 8998^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15214 + ... + 19834.

Almost surely, 2^80978404 is an apocalyptic number.

It is an amenable number.

80978404 is a deficient number, since it is larger than the sum of its proper divisors (72120724).

80978404 is a wasteful number, since it uses less digits than its factorization.

80978404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4975 (or 4973 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 80978404 is about 8998.8001422412. The cubic root of 80978404 is about 432.6364148080.

The spelling of 80978404 in words is "eighty million, nine hundred seventy-eight thousand, four hundred four".