390638163 has 8 divisors (see below), whose sum is σ = 521096128. Its totient is φ = 260302824.

The previous prime is 390638153. The next prime is 390638179. The reversal of 390638163 is 361836093.

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

It is not a de Polignac number, because 390638163 - 2⁴ = 390638147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390638123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22945 + ... + 36162.

It is an arithmetic number, because the mean of its divisors is an integer number (65137016).

Almost surely, 2^390638163 is an apocalyptic number.

390638163 is a deficient number, since it is larger than the sum of its proper divisors (130457965).

390638163 is a wasteful number, since it uses less digits than its factorization.

390638163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61313.

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 390638163 is about 19764.5683737338. The cubic root of 390638163 is about 731.0126454147.

The spelling of 390638163 in words is "three hundred ninety million, six hundred thirty-eight thousand, one hundred sixty-three".