866244544 has 28 divisors (see below), whose sum is σ = 1875224088. Its totient is φ = 393747200.

The previous prime is 866244527. The next prime is 866244551. The reversal of 866244544 is 445442668.

866244544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×866244544² = 1500759220019535872, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 866244544.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 614527 + ... + 615934.

Almost surely, 2^866244544 is an apocalyptic number.

It is an amenable number.

866244544 is an abundant number, since it is smaller than the sum of its proper divisors (1008979544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866244544 is a wasteful number, since it uses less digits than its factorization.

866244544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230484 (or 1230474 counting only the distinct ones).

The product of its digits is 737280, while the sum is 43.

The square root of 866244544 is about 29432.0326175410. The cubic root of 866244544 is about 953.2646845553.

The spelling of 866244544 in words is "eight hundred sixty-six million, two hundred forty-four thousand, five hundred forty-four".