396118261 has 32 divisors (see below), whose sum is σ = 508870656. Its totient is φ = 299376000.

The previous prime is 396118253. The next prime is 396118277. The reversal of 396118261 is 162811693.

It is not a de Polignac number, because 396118261 - 2³ = 396118253 is a prime.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 396118261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396118211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 855316 + ... + 855778.

It is an arithmetic number, because the mean of its divisors is an integer number (15902208).

Almost surely, 2^396118261 is an apocalyptic number.

It is an amenable number.

396118261 is a deficient number, since it is larger than the sum of its proper divisors (112752395).

396118261 is a wasteful number, since it uses less digits than its factorization.

396118261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793.

The product of its digits is 15552, while the sum is 37.

The square root of 396118261 is about 19902.7199397469. The cubic root of 396118261 is about 734.4151399602.

It can be divided in two parts, 3961 and 18261, that added together give a palindrome (22222).

The spelling of 396118261 in words is "three hundred ninety-six million, one hundred eighteen thousand, two hundred sixty-one".