11331420 has 24 divisors (see below), whose sum is σ = 31728144. Its totient is φ = 3021696.

The previous prime is 11331389. The next prime is 11331473. The reversal of 11331420 is 2413311.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11331420.

It is a congruent number.

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, 94369 + ... + 94488.

It is an arithmetic number, because the mean of its divisors is an integer number (1322006).

Almost surely, 2^11331420 is an apocalyptic number.

11331420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11331420 is an abundant number, since it is smaller than the sum of its proper divisors (20396724).

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

11331420 is a wasteful number, since it uses less digits than its factorization.

11331420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188869 (or 188867 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 11331420 is about 3366.2174617811. The cubic root of 11331420 is about 224.6094954815.

Adding to 11331420 its reverse (2413311), we get a palindrome (13744731).

The spelling of 11331420 in words is "eleven million, three hundred thirty-one thousand, four hundred twenty".