11220400 has 30 divisors (see below), whose sum is σ = 26957972. Its totient is φ = 4488000.

The previous prime is 11220397. The next prime is 11220403. The reversal of 11220400 is 402211.

11220400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11220397) and next prime (11220403).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (11220403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13626 + ... + 14425.

Almost surely, 2^11220400 is an apocalyptic number.

11220400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11220400 is an abundant number, since it is smaller than the sum of its proper divisors (15737572).

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

11220400 is a wasteful number, since it uses less digits than its factorization.

11220400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28069 (or 28058 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 11220400 is about 3349.6865525001. The cubic root of 11220400 is about 223.8735468250.

Adding to 11220400 its reverse (402211), we get a palindrome (11622611).

The spelling of 11220400 in words is "eleven million, two hundred twenty thousand, four hundred".