11978788 has 6 divisors (see below), whose sum is σ = 20962886. Its totient is φ = 5989392.

The previous prime is 11978737. The next prime is 11978819. The reversal of 11978788 is 88787911.

It can be written as a sum of positive squares in only one way, i.e., 10614564 + 1364224 = 3258^2 + 1168^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1497345 + ... + 1497352.

Almost surely, 2^11978788 is an apocalyptic number.

It is an amenable number.

11978788 is a deficient number, since it is larger than the sum of its proper divisors (8984098).

11978788 is a wasteful number, since it uses less digits than its factorization.

11978788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2994701 (or 2994699 counting only the distinct ones).

The product of its digits is 225792, while the sum is 49.

The square root of 11978788 is about 3461.0385724519. The cubic root of 11978788 is about 228.8078707335.

The spelling of 11978788 in words is "eleven million, nine hundred seventy-eight thousand, seven hundred eighty-eight".