11984640 has 72 divisors (see below), whose sum is σ = 38288208. Its totient is φ = 3194880.

The previous prime is 11984639. The next prime is 11984653. The reversal of 11984640 is 4648911.

11984640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2280 + ... + 5400.

Almost surely, 2^11984640 is an apocalyptic number.

11984640 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 11984640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19144104).

11984640 is an abundant number, since it is smaller than the sum of its proper divisors (26303568).

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

11984640 is an equidigital number, since it uses as much as digits as its factorization.

11984640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145 (or 3131 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 11984640 is about 3461.8838802016. The cubic root of 11984640 is about 228.8451245212.

The spelling of 11984640 in words is "eleven million, nine hundred eighty-four thousand, six hundred forty".