397693386 has 12 divisors (see below), whose sum is σ = 861669042. Its totient is φ = 132564456.

The previous prime is 397693357. The next prime is 397693409. The reversal of 397693386 is 683396793.

It can be written as a sum of positive squares in only one way, i.e., 389312361 + 8381025 = 19731^2 + 2895^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11047021 + ... + 11047056.

Almost surely, 2^397693386 is an apocalyptic number.

397693386 is an abundant number, since it is smaller than the sum of its proper divisors (463975656).

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

397693386 is a wasteful number, since it uses less digits than its factorization.

397693386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22094085 (or 22094082 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 54.

The square root of 397693386 is about 19942.2512771252. The cubic root of 397693386 is about 735.3872955384.

The spelling of 397693386 in words is "three hundred ninety-seven million, six hundred ninety-three thousand, three hundred eighty-six".