404838681 has 16 divisors (see below), whose sum is σ = 611903040. Its totient is φ = 236018880.

The previous prime is 404838649. The next prime is 404838689. The reversal of 404838681 is 186838404.

It is not a de Polignac number, because 404838681 - 2⁵ = 404838649 is a prime.

It is a super-2 number, since 2×404838681² = 327788715267639522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (404838689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272430 + ... + 273911.

It is an arithmetic number, because the mean of its divisors is an integer number (38243940).

Almost surely, 2^404838681 is an apocalyptic number.

It is an amenable number.

404838681 is a deficient number, since it is larger than the sum of its proper divisors (207064359).

404838681 is a wasteful number, since it uses less digits than its factorization.

404838681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546376.

The product of its (nonzero) digits is 147456, while the sum is 42.

The square root of 404838681 is about 20120.6033955247. The cubic root of 404838681 is about 739.7653754595.

The spelling of 404838681 in words is "four hundred four million, eight hundred thirty-eight thousand, six hundred eighty-one".