10989988 has 6 divisors (see below), whose sum is σ = 19232486. Its totient is φ = 5494992.

The previous prime is 10989977. The next prime is 10989991. The reversal of 10989988 is 88998901.

10989988 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., 9784384 + 1205604 = 3128^2 + 1098^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1373745 + ... + 1373752.

Almost surely, 2^10989988 is an apocalyptic number.

It is an amenable number.

10989988 is a deficient number, since it is larger than the sum of its proper divisors (8242498).

10989988 is a wasteful number, since it uses less digits than its factorization.

10989988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2747501 (or 2747499 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 52.

The square root of 10989988 is about 3315.1150809587. The cubic root of 10989988 is about 222.3305143672.

The spelling of 10989988 in words is "ten million, nine hundred eighty-nine thousand, nine hundred eighty-eight".