11943780 has 48 divisors (see below), whose sum is σ = 35206080. Its totient is φ = 3017088.

The previous prime is 11943779. The next prime is 11943787. The reversal of 11943780 is 8734911.

It is not an unprimeable number, because it can be changed into a prime (11943787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4099 + ... + 6378.

It is an arithmetic number, because the mean of its divisors is an integer number (733460).

Almost surely, 2^11943780 is an apocalyptic number.

11943780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11943780 is an abundant number, since it is smaller than the sum of its proper divisors (23262300).

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

11943780 is a wasteful number, since it uses less digits than its factorization.

11943780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10508 (or 10506 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 11943780 is about 3455.9774304819. The cubic root of 11943780 is about 228.5847562913.

The spelling of 11943780 in words is "eleven million, nine hundred forty-three thousand, seven hundred eighty".