244020309 has 16 divisors (see below), whose sum is σ = 350714112. Its totient is φ = 150026688.

The previous prime is 244020307. The next prime is 244020311. The reversal of 244020309 is 903020442.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (244020307) and next prime (244020311).

It is not a de Polignac number, because 244020309 - 2¹ = 244020307 is a prime.

It is a super-2 number, since 2×244020309² = 119091822408910962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244020307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53299 + ... + 57695.

It is an arithmetic number, because the mean of its divisors is an integer number (21919632).

Almost surely, 2^244020309 is an apocalyptic number.

It is an amenable number.

244020309 is a deficient number, since it is larger than the sum of its proper divisors (106693803).

244020309 is a wasteful number, since it uses less digits than its factorization.

244020309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5836.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 244020309 is about 15621.1494135355. The cubic root of 244020309 is about 624.8973134764.

The spelling of 244020309 in words is "two hundred forty-four million, twenty thousand, three hundred nine".