397457306 has 8 divisors (see below), whose sum is σ = 602332500. Its totient is φ = 196679808.

The previous prime is 397457303. The next prime is 397457309. The reversal of 397457306 is 603754793.

It is an interprime number because it is at equal distance from previous prime (397457303) and next prime (397457309).

It can be written as a sum of positive squares in 2 ways, for example, as 376709281 + 20748025 = 19409^2 + 4555^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (397457303) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1024181 + ... + 1024568.

Almost surely, 2^397457306 is an apocalyptic number.

397457306 is a deficient number, since it is larger than the sum of its proper divisors (204875194).

397457306 is a wasteful number, since it uses less digits than its factorization.

397457306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2048848.

The product of its (nonzero) digits is 476280, while the sum is 44.

The square root of 397457306 is about 19936.3313074397. The cubic root of 397457306 is about 735.2417524280.

The spelling of 397457306 in words is "three hundred ninety-seven million, four hundred fifty-seven thousand, three hundred six".