11999940 has 24 divisors (see below), whose sum is σ = 33600000. Its totient is φ = 3199968.

The previous prime is 11999929. The next prime is 11999941. The reversal of 11999940 is 4999911.

11999940 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 11999892 and 11999901.

It is not an unprimeable number, because it can be changed into a prime (11999941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99940 + ... + 100059.

It is an arithmetic number, because the mean of its divisors is an integer number (1400000).

Almost surely, 2^11999940 is an apocalyptic number.

11999940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11999940 is an abundant number, since it is smaller than the sum of its proper divisors (21600060).

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

11999940 is a wasteful number, since it uses less digits than its factorization.

11999940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200011 (or 200009 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 42.

The square root of 11999940 is about 3464.0929548729. The cubic root of 11999940 is about 228.9424669386.

The spelling of 11999940 in words is "eleven million, nine hundred ninety-nine thousand, nine hundred forty".