397309700 has 72 divisors (see below), whose sum is σ = 892151232. Its totient is φ = 153463680.

The previous prime is 397309699. The next prime is 397309709. The reversal of 397309700 is 7903793.

It is not an unprimeable number, because it can be changed into a prime (397309709) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 617579 + ... + 618221.

Almost surely, 2^397309700 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 397309700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (446075616).

397309700 is an abundant number, since it is smaller than the sum of its proper divisors (494841532).

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

397309700 is a wasteful number, since it uses less digits than its factorization.

397309700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861 (or 854 counting only the distinct ones).

The product of its (nonzero) digits is 35721, while the sum is 38.

The square root of 397309700 is about 19932.6290288060. The cubic root of 397309700 is about 735.1507241760.

The spelling of 397309700 in words is "three hundred ninety-seven million, three hundred nine thousand, seven hundred".