397628270 has 48 divisors (see below), whose sum is σ = 796093920. Its totient is φ = 142826112.

The previous prime is 397628269. The next prime is 397628279. The reversal of 397628270 is 72826793.

It is a super-2 number, since 2×397628270² = 316216482206385800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397628279) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59351 + ... + 65709.

It is an arithmetic number, because the mean of its divisors is an integer number (16585290).

Almost surely, 2^397628270 is an apocalyptic number.

397628270 is an abundant number, since it is smaller than the sum of its proper divisors (398465650).

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

397628270 is a wasteful number, since it uses less digits than its factorization.

397628270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6429 (or 6416 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 397628270 is about 19940.6185962221. The cubic root of 397628270 is about 735.3471573360.

The spelling of 397628270 in words is "three hundred ninety-seven million, six hundred twenty-eight thousand, two hundred seventy".