400000404 has 24 divisors (see below), whose sum is σ = 938927808. Its totient is φ = 132534400.

The previous prime is 400000373. The next prime is 400000411. The reversal of 400000404 is 404000004.

It is a Harshad number since it is a multiple of its sum of digits (12).

400000404 is a modest number, since divided by 404 gives 4 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 400000404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97797 + ... + 101804.

It is an arithmetic number, because the mean of its divisors is an integer number (39121992).

Almost surely, 2^400000404 is an apocalyptic number.

It is an amenable number.

400000404 is an abundant number, since it is smaller than the sum of its proper divisors (538927404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400000404 is a wasteful number, since it uses less digits than its factorization.

400000404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199775 (or 199773 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 400000404 is about 20000.0100999974. The cubic root of 400000404 is about 736.8065477861.

Adding to 400000404 its reverse (404000004), we get a palindrome (804000408).

The spelling of 400000404 in words is "four hundred million, four hundred four", and thus it is an aban number.