397197306 has 96 divisors (see below), whose sum is σ = 967449600. Its totient is φ = 116756640.

The previous prime is 397197301. The next prime is 397197431. The reversal of 397197306 is 603791793.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (397197301) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1047825 + ... + 1048203.

It is an arithmetic number, because the mean of its divisors is an integer number (10077600).

Almost surely, 2^397197306 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397197306, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (483724800).

397197306 is an abundant number, since it is smaller than the sum of its proper divisors (570252294).

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

397197306 is a wasteful number, since it uses less digits than its factorization.

397197306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544 (or 541 counting only the distinct ones).

The product of its (nonzero) digits is 214326, while the sum is 45.

The square root of 397197306 is about 19929.8094822806. The cubic root of 397197306 is about 735.0813959558.

The spelling of 397197306 in words is "three hundred ninety-seven million, one hundred ninety-seven thousand, three hundred six".