11803978 has 12 divisors (see below), whose sum is σ = 18688050. Its totient is φ = 5591016.

The previous prime is 11803969. The next prime is 11804021. The reversal of 11803978 is 87930811.

It can be written as a sum of positive squares in only one way, i.e., 11309769 + 494209 = 3363^2 + 703^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7453 + ... + 8896.

Almost surely, 2^11803978 is an apocalyptic number.

11803978 is a deficient number, since it is larger than the sum of its proper divisors (6884072).

11803978 is a wasteful number, since it uses less digits than its factorization.

11803978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16389 (or 16370 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 11803978 is about 3435.6917789581. The cubic root of 11803978 is about 227.6893918604.

The spelling of 11803978 in words is "eleven million, eight hundred three thousand, nine hundred seventy-eight".