10851989 has 8 divisors (see below), whose sum is σ = 11200728. Its totient is φ = 10506240.

The previous prime is 10851979. The next prime is 10852007. The reversal of 10851989 is 98915801.

10851989 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 4 ways, for example, as 4169764 + 6682225 = 2042^2 + 2585^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10851989 - 2⁸ = 10851733 is a prime.

It is a super-2 number, since 2×10851989² = 235531330512242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10851949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8309 + ... + 9525.

It is an arithmetic number, because the mean of its divisors is an integer number (1400091).

Almost surely, 2^10851989 is an apocalyptic number.

It is an amenable number.

10851989 is a deficient number, since it is larger than the sum of its proper divisors (348739).

10851989 is a wasteful number, since it uses less digits than its factorization.

10851989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495.

The product of its (nonzero) digits is 25920, while the sum is 41.

The square root of 10851989 is about 3294.2357231989. The cubic root of 10851989 is about 221.3960058545.

The spelling of 10851989 in words is "ten million, eight hundred fifty-one thousand, nine hundred eighty-nine".