11747978 has 8 divisors (see below), whose sum is σ = 19224000. Its totient is φ = 5339980.

The previous prime is 11747971. The next prime is 11748031. The reversal of 11747978 is 87974711.

It is a happy number.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11747971) 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, 266978 + ... + 267021.

It is an arithmetic number, because the mean of its divisors is an integer number (2403000).

Almost surely, 2^11747978 is an apocalyptic number.

11747978 is a deficient number, since it is larger than the sum of its proper divisors (7476022).

11747978 is a wasteful number, since it uses less digits than its factorization.

11747978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534012.

The product of its digits is 98784, while the sum is 44.

The square root of 11747978 is about 3427.5323484980. The cubic root of 11747978 is about 227.3287557283.

The spelling of 11747978 in words is "eleven million, seven hundred forty-seven thousand, nine hundred seventy-eight".