397305738 has 12 divisors (see below), whose sum is σ = 860829138. Its totient is φ = 132435240.

The previous prime is 397305731. The next prime is 397305757. The reversal of 397305738 is 837503793.

397305738 is a `hidden beast` number, since 3 + 9 + 73 + 0 + 573 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 336979449 + 60326289 = 18357^2 + 7767^2 .

It is a junction number, because it is equal to n+sod(n) for n = 397305693 and 397305702.

It is not an unprimeable number, because it can be changed into a prime (397305731) 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 5 ways as a sum of consecutive naturals, for example, 11036253 + ... + 11036288.

Almost surely, 2^397305738 is an apocalyptic number.

397305738 is an abundant number, since it is smaller than the sum of its proper divisors (463523400).

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

397305738 is a wasteful number, since it uses less digits than its factorization.

397305738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22072549 (or 22072546 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 45.

The square root of 397305738 is about 19932.5296437758. The cubic root of 397305738 is about 735.1482805098.

The spelling of 397305738 in words is "three hundred ninety-seven million, three hundred five thousand, seven hundred thirty-eight".