11815420 has 12 divisors (see below), whose sum is σ = 24812424. Its totient is φ = 4726160.

The previous prime is 11815387. The next prime is 11815429. The reversal of 11815420 is 2451811.

It is a junction number, because it is equal to n+sod(n) for n = 11815391 and 11815400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11815429) 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 3 ways as a sum of consecutive naturals, for example, 295366 + ... + 295405.

It is an arithmetic number, because the mean of its divisors is an integer number (2067702).

Almost surely, 2^11815420 is an apocalyptic number.

11815420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11815420 is an abundant number, since it is smaller than the sum of its proper divisors (12997004).

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

11815420 is a wasteful number, since it uses less digits than its factorization.

11815420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590780 (or 590778 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 11815420 is about 3437.3565424611. The cubic root of 11815420 is about 227.7629371431.

The spelling of 11815420 in words is "eleven million, eight hundred fifteen thousand, four hundred twenty".