397218996 has 72 divisors (see below), whose sum is σ = 1058663424. Its totient is φ = 125392320.

The previous prime is 397218967. The next prime is 397219057. The reversal of 397218996 is 699812793.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48666 + ... + 56238.

Almost surely, 2^397218996 is an apocalyptic number.

397218996 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397218996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (529331712).

397218996 is an abundant number, since it is smaller than the sum of its proper divisors (661444428).

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

397218996 is a wasteful number, since it uses less digits than its factorization.

397218996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7661 (or 7656 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 397218996 is about 19930.3536345946. The cubic root of 397218996 is about 735.0947760610.

The spelling of 397218996 in words is "three hundred ninety-seven million, two hundred eighteen thousand, nine hundred ninety-six".