397309608 has 96 divisors (see below), whose sum is σ = 1137240000. Its totient is φ = 124962048.

The previous prime is 397309573. The next prime is 397309667. The reversal of 397309608 is 806903793.

It is a happy number.

397309608 is a `hidden beast` number, since 3 + 9 + 7 + 30 + 9 + 608 = 666.

It is a super-2 number, since 2×397309608² = 315709849218227328, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 490708 + ... + 491516.

It is an arithmetic number, because the mean of its divisors is an integer number (11846250).

Almost surely, 2^397309608 is an apocalyptic number.

397309608 is a gapful number since it is divisible by the number (38) 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 397309608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (568620000).

397309608 is an abundant number, since it is smaller than the sum of its proper divisors (739930392).

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

397309608 is a wasteful number, since it uses less digits than its factorization.

397309608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199 (or 1192 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 397309608 is about 19932.6267210320. The cubic root of 397309608 is about 735.1506674328.

The spelling of 397309608 in words is "three hundred ninety-seven million, three hundred nine thousand, six hundred eight".