11945840 has 20 divisors (see below), whose sum is σ = 27774264. Its totient is φ = 4778304.

The previous prime is 11945839. The next prime is 11945861. The reversal of 11945840 is 4854911.

11945840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 11945797 and 11945806.

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, 74582 + ... + 74741.

Almost surely, 2^11945840 is an apocalyptic number.

11945840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11945840 is an abundant number, since it is smaller than the sum of its proper divisors (15828424).

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

11945840 is a wasteful number, since it uses less digits than its factorization.

11945840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149336 (or 149330 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 11945840 is about 3456.2754519859. The cubic root of 11945840 is about 228.5978972324.

The spelling of 11945840 in words is "eleven million, nine hundred forty-five thousand, eight hundred forty".