80278864 has 20 divisors (see below), whose sum is σ = 157863904. Its totient is φ = 39539808.

The previous prime is 80278841. The next prime is 80278883. The reversal of 80278864 is 46887208.

It is a self number, because there is not a number n which added to its sum of digits gives 80278864.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36372 + ... + 38515.

Almost surely, 2^80278864 is an apocalyptic number.

It is an amenable number.

80278864 is a deficient number, since it is larger than the sum of its proper divisors (77585040).

80278864 is a wasteful number, since it uses less digits than its factorization.

80278864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74962 (or 74956 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 80278864 is about 8959.8473201277. The cubic root of 80278864 is about 431.3870192908.

The spelling of 80278864 in words is "eighty million, two hundred seventy-eight thousand, eight hundred sixty-four".