2120404400 has 30 divisors (see below), whose sum is σ = 5094272532. Its totient is φ = 848161600.

The previous prime is 2120404381. The next prime is 2120404417. The reversal of 2120404400 is 44040212.

It is a super-2 number, since 2×2120404400² = 8992229639078720000, which contains 22 as substring.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 2650106 + ... + 2650905.

Almost surely, 2^2120404400 is an apocalyptic number.

2120404400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120404400 is an abundant number, since it is smaller than the sum of its proper divisors (2973868132).

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

2120404400 is a wasteful number, since it uses less digits than its factorization.

2120404400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5301029 (or 5301018 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 2120404400 is about 46047.8490268547. The cubic root of 2120404400 is about 1284.7133357020.

Adding to 2120404400 its reverse (44040212), we get a palindrome (2164444612).

The spelling of 2120404400 in words is "two billion, one hundred twenty million, four hundred four thousand, four hundred".