2204400400 has 30 divisors (see below), whose sum is σ = 5296072922. Its totient is φ = 881760000.

The previous prime is 2204400397. The next prime is 2204400409. The reversal of 2204400400 is 40044022.

It can be written as a sum of positive squares in 3 ways, for example, as 30603024 + 2173797376 = 5532^2 + 46624^2 .

It is a super-2 number, since 2×2204400400² = 9718762247040320000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (2204400409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2755101 + ... + 2755900.

Almost surely, 2^2204400400 is an apocalyptic number.

2204400400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2204400400 is an abundant number, since it is smaller than the sum of its proper divisors (3091672522).

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

2204400400 is a wasteful number, since it uses less digits than its factorization.

2204400400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5511019 (or 5511008 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 2204400400 is about 46951.0425869330. The cubic root of 2204400400 is about 1301.4580091355.

Adding to 2204400400 its reverse (40044022), we get a palindrome (2244444422).

The spelling of 2204400400 in words is "two billion, two hundred four million, four hundred thousand, four hundred".