11391420 has 48 divisors (see below), whose sum is σ = 32044320. Its totient is φ = 3023616.

The previous prime is 11391383. The next prime is 11391421. The reversal of 11391420 is 2419311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11391421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22126 + ... + 22634.

It is an arithmetic number, because the mean of its divisors is an integer number (667590).

Almost surely, 2^11391420 is an apocalyptic number.

11391420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11391420 is an abundant number, since it is smaller than the sum of its proper divisors (20652900).

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

11391420 is a wasteful number, since it uses less digits than its factorization.

11391420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894 (or 892 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 11391420 is about 3375.1177757228. The cubic root of 11391420 is about 225.0052344461.

It can be divided in two parts, 11391 and 420, that added together give a palindrome (11811).

The spelling of 11391420 in words is "eleven million, three hundred ninety-one thousand, four hundred twenty".