11405920 has 24 divisors (see below), whose sum is σ = 26946864. Its totient is φ = 4562304.

The previous prime is 11405899. The next prime is 11405959. The reversal of 11405920 is 2950411.

It is a super-2 number, since 2×11405920² = 260190022092800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11405891 and 11405900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35484 + ... + 35803.

It is an arithmetic number, because the mean of its divisors is an integer number (1122786).

Almost surely, 2^11405920 is an apocalyptic number.

11405920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11405920 is an abundant number, since it is smaller than the sum of its proper divisors (15540944).

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

11405920 is an equidigital number, since it uses as much as digits as its factorization.

11405920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71302 (or 71294 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 11405920 is about 3377.2651657813. The cubic root of 11405920 is about 225.1006627767.

The spelling of 11405920 in words is "eleven million, four hundred five thousand, nine hundred twenty".