397678158 has 24 divisors (see below), whose sum is σ = 873442128. Its totient is φ = 130743072.

The previous prime is 397678157. The next prime is 397678207. The reversal of 397678158 is 851876793.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397678153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150010 + ... + 152637.

It is an arithmetic number, because the mean of its divisors is an integer number (36393422).

Almost surely, 2^397678158 is an apocalyptic number.

397678158 is an abundant number, since it is smaller than the sum of its proper divisors (475763970).

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

397678158 is a wasteful number, since it uses less digits than its factorization.

397678158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302728 (or 302725 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 397678158 is about 19941.8694710401. The cubic root of 397678158 is about 735.3779092280.

The spelling of 397678158 in words is "three hundred ninety-seven million, six hundred seventy-eight thousand, one hundred fifty-eight".