397224 has 40 divisors (see below), whose sum is σ = 1114410. Its totient is φ = 132192.

The previous prime is 397223. The next prime is 397237. The reversal of 397224 is 422793.

It can be written as a sum of positive squares in only one way, i.e., 396900 + 324 = 630^2 + 18^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (397223) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 342 + ... + 954.

2³⁹⁷²²⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (557205).

397224 is an abundant number, since it is smaller than the sum of its proper divisors (717186).

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

397224 is a wasteful number, since it uses less digits than its factorization.

397224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631 (or 618 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 397224 is about 630.2570904004. The cubic root of 397224 is about 73.5097862854.

The spelling of 397224 in words is "three hundred ninety-seven thousand, two hundred twenty-four".