2400404004 has 24 divisors (see below), whose sum is σ = 6223269920. Its totient is φ = 800134632.

The previous prime is 2400403981. The next prime is 2400404033. The reversal of 2400404004 is 4004040042.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 11112874 + ... + 11113089.

Almost surely, 2^2400404004 is an apocalyptic number.

It is an amenable number.

2400404004 is an abundant number, since it is smaller than the sum of its proper divisors (3822865916).

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

2400404004 is a wasteful number, since it uses less digits than its factorization.

2400404004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22225976 (or 22225968 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 2400404004 is about 48993.9180307107. The cubic root of 2400404004 is about 1338.9410219464.

Adding to 2400404004 its reverse (4004040042), we get a palindrome (6404444046).

It can be divided in two parts, 2 and 400404004, that multiplied together give a palindrome (800808008).

The spelling of 2400404004 in words is "two billion, four hundred million, four hundred four thousand, four".