244640645 has 8 divisors (see below), whose sum is σ = 300729240. Its totient is φ = 190938880.

The previous prime is 244640611. The next prime is 244640647. The reversal of 244640645 is 546046442.

It can be written as a sum of positive squares in 4 ways, for example, as 749956 + 243890689 = 866^2 + 15617^2 .

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

It is not a de Polignac number, because 244640645 - 2¹⁸ = 244378501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244640647) 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, 596480 + ... + 596889.

It is an arithmetic number, because the mean of its divisors is an integer number (37591155).

Almost surely, 2^244640645 is an apocalyptic number.

It is an amenable number.

244640645 is a deficient number, since it is larger than the sum of its proper divisors (56088595).

244640645 is a wasteful number, since it uses less digits than its factorization.

244640645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193415.

The product of its (nonzero) digits is 92160, while the sum is 35.

The square root of 244640645 is about 15640.9924557235. The cubic root of 244640645 is about 625.4263927699.

The spelling of 244640645 in words is "two hundred forty-four million, six hundred forty thousand, six hundred forty-five".