397381465924 has 81 divisors (see below), whose sum is σ = 750451738743. Its totient is φ = 184091716224.

The previous prime is 397381465907. The next prime is 397381465927. The reversal of 397381465924 is 429564183793.

It is a happy number.

The square root of 397381465924 is 630382.

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

It can be written as a sum of positive squares in 4 ways, for example, as 83647051524 + 313734414400 = 289218^2 + 560120^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397381465927) 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, 1269589192 + ... + 1269589504.

Almost surely, 2^397381465924 is an apocalyptic number.

397381465924 is the 630382-nd square number.

It is an amenable number.

397381465924 is a deficient number, since it is larger than the sum of its proper divisors (353070272819).

397381465924 is an equidigital number, since it uses as much as digits as its factorization.

397381465924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774 (or 387 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 61.

The spelling of 397381465924 in words is "three hundred ninety-seven billion, three hundred eighty-one million, four hundred sixty-five thousand, nine hundred twenty-four".