397758858 has 32 divisors (see below), whose sum is σ = 930310656. Its totient is φ = 111001968.

The previous prime is 397758847. The next prime is 397758859. The reversal of 397758858 is 858857793.

It is not an unprimeable number, because it can be changed into a prime (397758859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108316 + ... + 111927.

It is an arithmetic number, because the mean of its divisors is an integer number (29072208).

Almost surely, 2^397758858 is an apocalyptic number.

397758858 is an abundant number, since it is smaller than the sum of its proper divisors (532551798).

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

397758858 is a wasteful number, since it uses less digits than its factorization.

397758858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220298.

The product of its digits is 16934400, while the sum is 60.

The square root of 397758858 is about 19943.8927494108. The cubic root of 397758858 is about 735.4276487659.

It can be divided in two parts, 3977 and 58858, that added together give a triangular number (62835 = T₃₅₄).

The spelling of 397758858 in words is "three hundred ninety-seven million, seven hundred fifty-eight thousand, eight hundred fifty-eight".