397219660 has 24 divisors (see below), whose sum is σ = 870430176. Its totient is φ = 151979520.

The previous prime is 397219621. The next prime is 397219661. The reversal of 397219660 is 66912793.

It is not an unprimeable number, because it can be changed into a prime (397219661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431301 + ... + 432220.

It is an arithmetic number, because the mean of its divisors is an integer number (36267924).

Almost surely, 2^397219660 is an apocalyptic number.

It is an amenable number.

397219660 is an abundant number, since it is smaller than the sum of its proper divisors (473210516).

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

397219660 is a wasteful number, since it uses less digits than its factorization.

397219660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863553 (or 863551 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 397219660 is about 19930.3702925962. The cubic root of 397219660 is about 735.0951856610.

It can be divided in two parts, 3972 and 19660, that added together give a palindrome (23632).

The spelling of 397219660 in words is "three hundred ninety-seven million, two hundred nineteen thousand, six hundred sixty".