397182644 has 12 divisors (see below), whose sum is σ = 696200484. Its totient is φ = 198268224.

The previous prime is 397182623. The next prime is 397182661. The reversal of 397182644 is 446281793.

It can be written as a sum of positive squares in 2 ways, for example, as 76772644 + 320410000 = 8762^2 + 17900^2 .

It is a junction number, because it is equal to n+sod(n) for n = 397182595 and 397182604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77999 + ... + 82934.

It is an arithmetic number, because the mean of its divisors is an integer number (58016707).

Almost surely, 2^397182644 is an apocalyptic number.

It is an amenable number.

397182644 is a deficient number, since it is larger than the sum of its proper divisors (299017840).

397182644 is a wasteful number, since it uses less digits than its factorization.

397182644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161554 (or 161552 counting only the distinct ones).

The product of its digits is 290304, while the sum is 44.

The square root of 397182644 is about 19929.4416379386. The cubic root of 397182644 is about 735.0723510002.

The spelling of 397182644 in words is "three hundred ninety-seven million, one hundred eighty-two thousand, six hundred forty-four".