397936838 has 8 divisors (see below), whose sum is σ = 642821088. Its totient is φ = 183663144.

The previous prime is 397936831. The next prime is 397936841. The reversal of 397936838 is 838639793.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397936831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7652606 + ... + 7652657.

It is an arithmetic number, because the mean of its divisors is an integer number (80352636).

Almost surely, 2^397936838 is an apocalyptic number.

397936838 is a deficient number, since it is larger than the sum of its proper divisors (244884250).

397936838 is a wasteful number, since it uses less digits than its factorization.

397936838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15305278.

The product of its digits is 5878656, while the sum is 56.

The square root of 397936838 is about 19948.3542679590. The cubic root of 397936838 is about 735.5373231682.

The spelling of 397936838 in words is "three hundred ninety-seven million, nine hundred thirty-six thousand, eight hundred thirty-eight".