404045681 has 16 divisors (see below), whose sum is σ = 461873664. Its totient is φ = 350148864.

The previous prime is 404045657. The next prime is 404045683. The reversal of 404045681 is 186540404.

It is a de Polignac number, because none of the positive numbers 2^k-404045681 is a prime.

It is a super-2 number, since 2×404045681² = 326505824669507522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404045683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95840 + ... + 99966.

It is an arithmetic number, because the mean of its divisors is an integer number (28867104).

Almost surely, 2^404045681 is an apocalyptic number.

It is an amenable number.

404045681 is a deficient number, since it is larger than the sum of its proper divisors (57827983).

404045681 is a wasteful number, since it uses less digits than its factorization.

404045681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4600.

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 404045681 is about 20100.8875674683. The cubic root of 404045681 is about 739.2820410504.

The spelling of 404045681 in words is "four hundred four million, forty-five thousand, six hundred eighty-one".