800390128 has 20 divisors (see below), whose sum is σ = 1551784608. Its totient is φ = 399929600.

The previous prime is 800390117. The next prime is 800390131. The reversal of 800390128 is 821093008.

It is a self number, because there is not a number n which added to its sum of digits gives 800390128.

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, 9528 + ... + 41128.

Almost surely, 2^800390128 is an apocalyptic number.

It is an amenable number.

800390128 is a deficient number, since it is larger than the sum of its proper divisors (751394480).

800390128 is a wasteful number, since it uses less digits than its factorization.

800390128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33192 (or 33186 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 800390128 is about 28291.1669607318. The cubic root of 800390128 is about 928.4686433471.

The spelling of 800390128 in words is "eight hundred million, three hundred ninety thousand, one hundred twenty-eight".