397224252 has 36 divisors (see below), whose sum is σ = 1038721320. Its totient is φ = 127841952.

The previous prime is 397224251. The next prime is 397224257. The reversal of 397224252 is 252422793.

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397224251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 189198 + ... + 191285.

It is an arithmetic number, because the mean of its divisors is an integer number (28853370).

Almost surely, 2^397224252 is an apocalyptic number.

It is an amenable number.

397224252 is an abundant number, since it is smaller than the sum of its proper divisors (641497068).

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

397224252 is a wasteful number, since it uses less digits than its factorization.

397224252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380522 (or 380517 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 397224252 is about 19930.4854933341. The cubic root of 397224252 is about 735.0980183037.

It can be divided in two parts, 3972 and 24252, that added together give a square (28224 = 168²).

The spelling of 397224252 in words is "three hundred ninety-seven million, two hundred twenty-four thousand, two hundred fifty-two".