1000000404 has 72 divisors (see below), whose sum is σ = 2823082080. Its totient is φ = 307688544.

The previous prime is 1000000403. The next prime is 1000000409. The reversal of 1000000404 is 4040000001.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000000403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26934 + ... + 52205.

Almost surely, 2^1000000404 is an apocalyptic number.

It is an amenable number.

1000000404 is an abundant number, since it is smaller than the sum of its proper divisors (1823081676).

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

1000000404 is a wasteful number, since it uses less digits than its factorization.

1000000404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79171 (or 79157 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 1000000404 is about 31622.7829894840. The cubic root of 1000000404 is about 1000.0001346666. Note that the first 3 decimals are identical.

Adding to 1000000404 its reverse (4040000001), we get a palindrome (5040000405).

The spelling of 1000000404 in words is "one billion, four hundred four", and thus it is an aban number.