397658882404 has 81 divisors (see below), whose sum is σ = 837051869241. Its totient is φ = 164814138720.

The previous prime is 397658882399. The next prime is 397658882407. The reversal of 397658882404 is 404288856793.

The square root of 397658882404 is 630602.

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., 387867384100 + 9791498304 = 622790^2 + 98952^2 .

It is not an unprimeable number, because it can be changed into a prime (397658882407) 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, 273680542 + ... + 273681994.

Almost surely, 2^397658882404 is an apocalyptic number.

397658882404 is the 630602-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397658882404

397658882404 is an abundant number, since it is smaller than the sum of its proper divisors (439392986837).

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

397658882404 is an equidigital number, since it uses as much as digits as its factorization.

397658882404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2986 (or 1493 counting only the distinct ones).

The product of its (nonzero) digits is 92897280, while the sum is 64.

Multiplying 397658882404 by its sum of digits (64), we get a square (25450168473856 = 5044816²).

It can be divided in two parts, 39765 and 8882404, that added together give a square (8922169 = 2987²).

The spelling of 397658882404 in words is "three hundred ninety-seven billion, six hundred fifty-eight million, eight hundred eighty-two thousand, four hundred four".