399800760804 has 81 divisors (see below), whose sum is σ = 1073725098537. Its totient is φ = 125407456128.

The previous prime is 399800760797. The next prime is 399800760809. The reversal of 399800760804 is 408067008993.

The square root of 399800760804 is 632298.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 311263568100 + 88537192704 = 557910^2 + 297552^2 .

It is not an unprimeable number, because it can be changed into a prime (399800760809) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 64491297 + ... + 64497495.

Almost surely, 2^399800760804 is an apocalyptic number.

399800760804 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

399800760804 is the 632298-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399800760804

399800760804 is an abundant number, since it is smaller than the sum of its proper divisors (673924337733).

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

399800760804 is an equidigital number, since it uses as much as digits as its factorization.

399800760804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12442 (or 6221 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 399800760804 in words is "three hundred ninety-nine billion, eight hundred million, seven hundred sixty thousand, eight hundred four".