11081978 has 12 divisors (see below), whose sum is σ = 17545050. Its totient is φ = 5249016.

The previous prime is 11081969. The next prime is 11082007. The reversal of 11081978 is 87918011.

11081978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 10067929 + 1014049 = 3173^2 + 1007^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6953 + ... + 8396.

Almost surely, 2^11081978 is an apocalyptic number.

11081978 is a deficient number, since it is larger than the sum of its proper divisors (6463072).

11081978 is a wasteful number, since it uses less digits than its factorization.

11081978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15389 (or 15370 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 35.

The square root of 11081978 is about 3328.9604984139. The cubic root of 11081978 is about 222.9491193482.

Adding to 11081978 its reverse (87918011), we get a palindrome (98999989).

The spelling of 11081978 in words is "eleven million, eighty-one thousand, nine hundred seventy-eight".