210989012 has 24 divisors (see below), whose sum is σ = 398135976. Its totient is φ = 97256448.

The previous prime is 210988979. The next prime is 210989017.

It is a happy number.

210989012 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 3225616 + 207763396 = 1796^2 + 14414^2 .

It is a super-2 number, since 2×210989012² = 89032726369472288, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 210989012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210989017) 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, 48728 + ... + 52880.

It is an arithmetic number, because the mean of its divisors is an integer number (16588999).

Almost surely, 2^210989012 is an apocalyptic number.

It is an amenable number.

210989012 is a deficient number, since it is larger than the sum of its proper divisors (187146964).

210989012 is a wasteful number, since it uses less digits than its factorization.

210989012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5147 (or 5145 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 210989012 is about 14525.4608188518. The cubic root of 210989012 is about 595.3238469608.

The spelling of 210989012 in words is "two hundred ten million, nine hundred eighty-nine thousand, twelve".