11903640 has 128 divisors (see below), whose sum is σ = 42024960. Its totient is φ = 2640384.

The previous prime is 11903579. The next prime is 11903657. The reversal of 11903640 is 4630911.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 11903640.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 30889 + ... + 31271.

It is an arithmetic number, because the mean of its divisors is an integer number (328320).

Almost surely, 2^11903640 is an apocalyptic number.

11903640 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 11903640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21012480).

11903640 is an abundant number, since it is smaller than the sum of its proper divisors (30121320).

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

11903640 is a wasteful number, since it uses less digits than its factorization.

11903640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441 (or 437 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 11903640 is about 3450.1652134354. The cubic root of 11903640 is about 228.3283971914.

The spelling of 11903640 in words is "eleven million, nine hundred three thousand, six hundred forty".