397618835 has 16 divisors (see below), whose sum is σ = 492003936. Its totient is φ = 308256768.

The previous prime is 397618789. The next prime is 397618939. The reversal of 397618835 is 538816793.

It is a happy number.

It is not a de Polignac number, because 397618835 - 2²⁴ = 380841619 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43364 + ... + 51726.

It is an arithmetic number, because the mean of its divisors is an integer number (30750246).

Almost surely, 2^397618835 is an apocalyptic number.

397618835 is a deficient number, since it is larger than the sum of its proper divisors (94385101).

397618835 is a wasteful number, since it uses less digits than its factorization.

397618835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8662.

The product of its digits is 1088640, while the sum is 50.

The square root of 397618835 is about 19940.3820174038. The cubic root of 397618835 is about 735.3413411371.

The spelling of 397618835 in words is "three hundred ninety-seven million, six hundred eighteen thousand, eight hundred thirty-five".