78801028 has 12 divisors (see below), whose sum is σ = 137966220. Its totient is φ = 39382112.

The previous prime is 78800987. The next prime is 78801031. The reversal of 78801028 is 82010887.

It can be written as a sum of positive squares in 2 ways, for example, as 68029504 + 10771524 = 8248^2 + 3282^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78800984 and 78801002.

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, 10650 + ... + 16462.

It is an arithmetic number, because the mean of its divisors is an integer number (11497185).

Almost surely, 2^78801028 is an apocalyptic number.

It is an amenable number.

78801028 is a deficient number, since it is larger than the sum of its proper divisors (59165192).

78801028 is a wasteful number, since it uses less digits than its factorization.

78801028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9206 (or 9204 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 34.

The square root of 78801028 is about 8876.9943111393. The cubic root of 78801028 is about 428.7235047815.

The spelling of 78801028 in words is "seventy-eight million, eight hundred one thousand, twenty-eight".