309244 has 24 divisors (see below), whose sum is σ = 615440. Its totient is φ = 134784.

The previous prime is 309241. The next prime is 309251. The reversal of 309244 is 442903.

309244 = T₂₂₁ + T₂₂₂ + ... + T₂₃₂.

309244 is an esthetic number in base 5, because in such base its adjacent digits differ by 1.

309244 is an undulating number in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 832 + ... + 1144.

2³⁰⁹²⁴⁴ is an apocalyptic number.

It is an amenable number.

309244 is a deficient number, since it is larger than the sum of its proper divisors (306196).

309244 is a wasteful number, since it uses less digits than its factorization.

309244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349 (or 347 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 309244 is about 556.0971138210. The cubic root of 309244 is about 67.6239332643.

It can be divided in two parts, 3092 and 44, that added together give a square (3136 = 56²).

The spelling of 309244 in words is "three hundred nine thousand, two hundred forty-four".