397320804 has 36 divisors (see below), whose sum is σ = 1063419084. Its totient is φ = 124649472.

The previous prime is 397320779. The next prime is 397320841. The reversal of 397320804 is 408023793.

It can be written as a sum of positive squares in 2 ways, for example, as 344176704 + 53144100 = 18552^2 + 7290^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 323997 + ... + 325220.

It is an arithmetic number, because the mean of its divisors is an integer number (29539419).

Almost surely, 2^397320804 is an apocalyptic number.

397320804 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

397320804 is an abundant number, since it is smaller than the sum of its proper divisors (666098280).

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

397320804 is a wasteful number, since it uses less digits than its factorization.

397320804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649244 (or 649239 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 397320804 is about 19932.9075651296. The cubic root of 397320804 is about 735.1575727692.

It can be divided in two parts, 397 and 320804, that added together give a triangular number (321201 = T₈₀₁).

The spelling of 397320804 in words is "three hundred ninety-seven million, three hundred twenty thousand, eight hundred four".