400800798 has 96 divisors (see below), whose sum is σ = 956067840. Its totient is φ = 125621280.

The previous prime is 400800773. The next prime is 400800817. The reversal of 400800798 is 897008004.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 557083 + ... + 557801.

It is an arithmetic number, because the mean of its divisors is an integer number (9959040).

Almost surely, 2^400800798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400800798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (478033920).

400800798 is an abundant number, since it is smaller than the sum of its proper divisors (555267042).

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

400800798 is a wasteful number, since it uses less digits than its factorization.

400800798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804 (or 792 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 400800798 is about 20020.0099400575. The cubic root of 400800798 is about 737.2976661454.

The spelling of 400800798 in words is "four hundred million, eight hundred thousand, seven hundred ninety-eight".