11100420 has 72 divisors (see below), whose sum is σ = 34122816. Its totient is φ = 2920512.

The previous prime is 11100409. The next prime is 11100433. The reversal of 11100420 is 2400111.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14569 + ... + 15311.

It is an arithmetic number, because the mean of its divisors is an integer number (473928).

Almost surely, 2^11100420 is an apocalyptic number.

11100420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11100420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17061408).

11100420 is an abundant number, since it is smaller than the sum of its proper divisors (23022396).

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

11100420 is a wasteful number, since it uses less digits than its factorization.

11100420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841 (or 836 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 11100420 is about 3331.7292807189. The cubic root of 11100420 is about 223.0727239064.

Adding to 11100420 its reverse (2400111), we get a palindrome (13500531).

The spelling of 11100420 in words is "eleven million, one hundred thousand, four hundred twenty".