397857273 has 32 divisors (see below), whose sum is σ = 624350592. Its totient is φ = 222643200.

The previous prime is 397857253. The next prime is 397857277. The reversal of 397857273 is 372758793.

It is not a de Polignac number, because 397857273 - 2⁵ = 397857241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (397857277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23043 + ... + 36423.

It is an arithmetic number, because the mean of its divisors is an integer number (19510956).

Almost surely, 2^397857273 is an apocalyptic number.

397857273 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

397857273 is a deficient number, since it is larger than the sum of its proper divisors (226493319).

397857273 is a wasteful number, since it uses less digits than its factorization.

397857273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13465.

The product of its digits is 2222640, while the sum is 51.

The square root of 397857273 is about 19946.3598934743. The cubic root of 397857273 is about 735.4882978604.

The spelling of 397857273 in words is "three hundred ninety-seven million, eight hundred fifty-seven thousand, two hundred seventy-three".