404889813 has 8 divisors (see below), whose sum is σ = 599836800. Its totient is φ = 269926524.

The previous prime is 404889811. The next prime is 404889841. The reversal of 404889813 is 318988404.

It is not a de Polignac number, because 404889813 - 2¹ = 404889811 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404889811) 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, 7497933 + ... + 7497986.

It is an arithmetic number, because the mean of its divisors is an integer number (74979600).

Almost surely, 2^404889813 is an apocalyptic number.

It is an amenable number.

404889813 is a deficient number, since it is larger than the sum of its proper divisors (194946987).

404889813 is a wasteful number, since it uses less digits than its factorization.

404889813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14995928 (or 14995922 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 404889813 is about 20121.8739932443. The cubic root of 404889813 is about 739.7965188034.

The spelling of 404889813 in words is "four hundred four million, eight hundred eighty-nine thousand, eight hundred thirteen".