397894722 has 8 divisors (see below), whose sum is σ = 795789456. Its totient is φ = 132631572.

The previous prime is 397894699. The next prime is 397894723. The reversal of 397894722 is 227498793.

It is a sphenic number, since it is the product of 3 distinct primes.

397894722 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (397894723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33157888 + ... + 33157899.

It is an arithmetic number, because the mean of its divisors is an integer number (99473682).

Almost surely, 2^397894722 is an apocalyptic number.

397894722 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

397894722 is a wasteful number, since it uses less digits than its factorization.

397894722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66315792.

The product of its digits is 1524096, while the sum is 51.

The square root of 397894722 is about 19947.2986140981. The cubic root of 397894722 is about 735.5113735033.

The spelling of 397894722 in words is "three hundred ninety-seven million, eight hundred ninety-four thousand, seven hundred twenty-two".