11745978 has 8 divisors (see below), whose sum is σ = 23491968. Its totient is φ = 3915324.

The previous prime is 11745973. The next prime is 11746001. The reversal of 11745978 is 87954711.

It is a sphenic number, since it is the product of 3 distinct primes.

11745978 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (11745973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 978826 + ... + 978837.

It is an arithmetic number, because the mean of its divisors is an integer number (2936496).

Almost surely, 2^11745978 is an apocalyptic number.

11745978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

11745978 is a wasteful number, since it uses less digits than its factorization.

11745978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1957668.

The product of its digits is 70560, while the sum is 42.

The square root of 11745978 is about 3427.2405809922. The cubic root of 11745978 is about 227.3158546907.

The spelling of 11745978 in words is "eleven million, seven hundred forty-five thousand, nine hundred seventy-eight".