10985978 has 16 divisors (see below), whose sum is σ = 17737704. Its totient is φ = 5084160.

The previous prime is 10985959. The next prime is 10985981. The reversal of 10985978 is 87958901.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9504889 + 1481089 = 3083^2 + 1217^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 575 + ... + 4722.

Almost surely, 2^10985978 is an apocalyptic number.

10985978 is a deficient number, since it is larger than the sum of its proper divisors (6751726).

10985978 is a wasteful number, since it uses less digits than its factorization.

10985978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5377.

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 10985978 is about 3314.5102202286. The cubic root of 10985978 is about 222.3034699392.

It can be divided in two parts, 1098 and 5978, that multiplied together give a square (6563844 = 2562²).

The spelling of 10985978 in words is "ten million, nine hundred eighty-five thousand, nine hundred seventy-eight".