800390000 has 50 divisors (see below), whose sum is σ = 1937848440. Its totient is φ = 320152000.

The previous prime is 800389981. The next prime is 800390011. The reversal of 800390000 is 93008.

It is a tau number, because it is divible by the number of its divisors (50).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 30020 + ... + 50019.

Almost surely, 2^800390000 is an apocalyptic number.

800390000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

800390000 is an abundant number, since it is smaller than the sum of its proper divisors (1137458440).

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

800390000 is an equidigital number, since it uses as much as digits as its factorization.

800390000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80067 (or 80046 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 800390000 is about 28291.1646985415. The cubic root of 800390000 is about 928.4685938529.

The spelling of 800390000 in words is "eight hundred million, three hundred ninety thousand".