397052290 has 16 divisors (see below), whose sum is σ = 714950712. Its totient is φ = 158763904.

The previous prime is 397052269. The next prime is 397052317. The reversal of 397052290 is 92250793.

It can be written as a sum of positive squares in 4 ways, for example, as 283821409 + 113230881 = 16847^2 + 10641^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32742 + ... + 43198.

Almost surely, 2^397052290 is an apocalyptic number.

397052290 is a deficient number, since it is larger than the sum of its proper divisors (317898422).

397052290 is a wasteful number, since it uses less digits than its factorization.

397052290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14261.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 397052290 is about 19926.1709819022. The cubic root of 397052290 is about 734.9919261149.

The spelling of 397052290 in words is "three hundred ninety-seven million, fifty-two thousand, two hundred ninety".