396398837 has 4 divisors (see below), whose sum is σ = 396438816. Its totient is φ = 396358860.

The previous prime is 396398831. The next prime is 396398851. The reversal of 396398837 is 738893693.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-396398837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396398831) 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, 7328 + ... + 29094.

It is an arithmetic number, because the mean of its divisors is an integer number (99109704).

Almost surely, 2^396398837 is an apocalyptic number.

It is an amenable number.

396398837 is a deficient number, since it is larger than the sum of its proper divisors (39979).

396398837 is a wasteful number, since it uses less digits than its factorization.

396398837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39978.

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

The square root of 396398837 is about 19909.7673768430. The cubic root of 396398837 is about 734.5884978099.

The spelling of 396398837 in words is "three hundred ninety-six million, three hundred ninety-eight thousand, eight hundred thirty-seven".