11965778 has 16 divisors (see below), whose sum is σ = 19819296. Its totient is φ = 5372640.

The previous prime is 11965771. The next prime is 11965781. The reversal of 11965778 is 87756911.

11965778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (11965771) 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, 1451 + ... + 5102.

It is an arithmetic number, because the mean of its divisors is an integer number (1238706).

Almost surely, 2^11965778 is an apocalyptic number.

11965778 is a deficient number, since it is larger than the sum of its proper divisors (7853518).

11965778 is a wasteful number, since it uses less digits than its factorization.

11965778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6649.

The product of its digits is 105840, while the sum is 44.

The square root of 11965778 is about 3459.1585682070. The cubic root of 11965778 is about 228.7250056798.

The spelling of 11965778 in words is "eleven million, nine hundred sixty-five thousand, seven hundred seventy-eight".