396885181 has 8 divisors (see below), whose sum is σ = 494817984. Its totient is φ = 309261120.

The previous prime is 396885173. The next prime is 396885187. The reversal of 396885181 is 181588693.

396885181 is nontrivially palindromic in base 2.

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

It is not a de Polignac number, because 396885181 - 2³ = 396885173 is a prime.

It is a super-2 number, since 2×396885181² = 315035693794805522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396885187) 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, 2577100 + ... + 2577253.

It is an arithmetic number, because the mean of its divisors is an integer number (61852248).

Almost surely, 2^396885181 is an apocalyptic number.

It is an amenable number.

396885181 is a deficient number, since it is larger than the sum of its proper divisors (97932803).

396885181 is a wasteful number, since it uses less digits than its factorization.

396885181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5154371.

The product of its digits is 414720, while the sum is 49.

The square root of 396885181 is about 19921.9773365999. The cubic root of 396885181 is about 734.8887986394. Note that the first 3 decimals are identical.

The spelling of 396885181 in words is "three hundred ninety-six million, eight hundred eighty-five thousand, one hundred eighty-one".