397914858 has 144 divisors (see below), whose sum is σ = 1024863840. Its totient is φ = 110510400.

The previous prime is 397914841. The next prime is 397914877. The reversal of 397914858 is 858419793.

It is a Curzon number.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 3037453 + ... + 3037583.

It is an arithmetic number, because the mean of its divisors is an integer number (7117110).

Almost surely, 2^397914858 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397914858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (512431920).

397914858 is an abundant number, since it is smaller than the sum of its proper divisors (626948982).

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

397914858 is a wasteful number, since it uses less digits than its factorization.

397914858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225 (or 199 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 397914858 is about 19947.8033377111. The cubic root of 397914858 is about 735.5237804763.

The spelling of 397914858 in words is "three hundred ninety-seven million, nine hundred fourteen thousand, eight hundred fifty-eight".