11903840 has 96 divisors (see below), whose sum is σ = 31116960. Its totient is φ = 4276224.

The previous prime is 11903809. The next prime is 11903849. The reversal of 11903840 is 4830911.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11903849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122672 + ... + 122768.

It is an arithmetic number, because the mean of its divisors is an integer number (324135).

Almost surely, 2^11903840 is an apocalyptic number.

11903840 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 11903840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15558480).

11903840 is an abundant number, since it is smaller than the sum of its proper divisors (19213120).

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

11903840 is a wasteful number, since it uses less digits than its factorization.

11903840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 11903840 is about 3450.1941974330. The cubic root of 11903840 is about 228.3296759438.

The spelling of 11903840 in words is "eleven million, nine hundred three thousand, eight hundred forty".