396638157 has 8 divisors (see below), whose sum is σ = 528970176. Its totient is φ = 264365792.

The previous prime is 396638119. The next prime is 396638161. The reversal of 396638157 is 751836693.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 396638157 - 2⁶ = 396638093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396638107) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4048 + ... + 28454.

It is an arithmetic number, because the mean of its divisors is an integer number (66121272).

Almost surely, 2^396638157 is an apocalyptic number.

It is an amenable number.

396638157 is a deficient number, since it is larger than the sum of its proper divisors (132332019).

396638157 is a wasteful number, since it uses less digits than its factorization.

396638157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29827.

The product of its digits is 816480, while the sum is 48.

The square root of 396638157 is about 19915.7765854109. The cubic root of 396638157 is about 734.7363004231.

The spelling of 396638157 in words is "three hundred ninety-six million, six hundred thirty-eight thousand, one hundred fifty-seven".