397207216 has 80 divisors (see below), whose sum is σ = 913655808. Its totient is φ = 163699200.

The previous prime is 397207201. The next prime is 397207231. The reversal of 397207216 is 612702793.

It is an interprime number because it is at equal distance from previous prime (397207201) and next prime (397207231).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 808731 + ... + 809221.

Almost surely, 2^397207216 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 397207216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (456827904).

397207216 is an abundant number, since it is smaller than the sum of its proper divisors (516448592).

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

397207216 is a wasteful number, since it uses less digits than its factorization.

397207216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770 (or 764 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 397207216 is about 19930.0581032771. The cubic root of 397207216 is about 735.0875092870.

The spelling of 397207216 in words is "three hundred ninety-seven million, two hundred seven thousand, two hundred sixteen".