397550290 has 16 divisors (see below), whose sum is σ = 717250968. Its totient is φ = 158651136.

The previous prime is 397550269. The next prime is 397550303. The reversal of 397550290 is 92055793.

It can be written as a sum of positive squares in 4 ways, for example, as 362940601 + 34609689 = 19051^2 + 5883^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41577 + ... + 50236.

Almost surely, 2^397550290 is an apocalyptic number.

397550290 is a deficient number, since it is larger than the sum of its proper divisors (319700678).

397550290 is a wasteful number, since it uses less digits than its factorization.

397550290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92253.

The product of its (nonzero) digits is 85050, while the sum is 40.

The square root of 397550290 is about 19938.6631949085. The cubic root of 397550290 is about 735.2990838592.

The spelling of 397550290 in words is "three hundred ninety-seven million, five hundred fifty thousand, two hundred ninety".