244640387 has 8 divisors (see below), whose sum is σ = 259358400. Its totient is φ = 229958784.

The previous prime is 244640377. The next prime is 244640401. The reversal of 244640387 is 783046442.

244640387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 244640387 - 2⁸ = 244640131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 244640387.

It is not an unprimeable number, because it can be changed into a prime (244640377) 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, 5414 + ... + 22772.

It is an arithmetic number, because the mean of its divisors is an integer number (32419800).

Almost surely, 2^244640387 is an apocalyptic number.

244640387 is a deficient number, since it is larger than the sum of its proper divisors (14718013).

244640387 is a wasteful number, since it uses less digits than its factorization.

244640387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18205.

The product of its (nonzero) digits is 129024, while the sum is 38.

The square root of 244640387 is about 15640.9842081629. The cubic root of 244640387 is about 625.4261729099.

It can be divided in two parts, 244640 and 387, that multiplied together give a triangular number (94675680 = T₁₃₇₆₀).

The spelling of 244640387 in words is "two hundred forty-four million, six hundred forty thousand, three hundred eighty-seven".