244645861 has 4 divisors (see below), whose sum is σ = 259036812. Its totient is φ = 230254912.

The previous prime is 244645853. The next prime is 244645867. The reversal of 244645861 is 168546442.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 218123361 + 26522500 = 14769^2 + 5150^2 .

It is a cyclic number.

It is not a de Polignac number, because 244645861 - 2³ = 244645853 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244645867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7195450 + ... + 7195483.

It is an arithmetic number, because the mean of its divisors is an integer number (64759203).

Almost surely, 2^244645861 is an apocalyptic number.

It is an amenable number.

244645861 is a deficient number, since it is larger than the sum of its proper divisors (14390951).

244645861 is a wasteful number, since it uses less digits than its factorization.

244645861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14390950.

The product of its digits is 184320, while the sum is 40.

The square root of 244645861 is about 15641.1591961721. The cubic root of 244645861 is about 625.4308376580.

The spelling of 244645861 in words is "two hundred forty-four million, six hundred forty-five thousand, eight hundred sixty-one".