244428139 has 8 divisors (see below), whose sum is σ = 246727440. Its totient is φ = 242136576.

The previous prime is 244428073. The next prime is 244428157. The reversal of 244428139 is 931824442.

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 244428139 - 2⁹ = 244427627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 244428098 and 244428107.

It is not an unprimeable number, because it can be changed into a prime (244428169) 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, 75547 + ... + 78715.

It is an arithmetic number, because the mean of its divisors is an integer number (30840930).

Almost surely, 2^244428139 is an apocalyptic number.

244428139 is a deficient number, since it is larger than the sum of its proper divisors (2299301).

244428139 is a wasteful number, since it uses less digits than its factorization.

244428139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3869.

The product of its digits is 55296, while the sum is 37.

The square root of 244428139 is about 15634.1977408500. The cubic root of 244428139 is about 625.2452490321.

The spelling of 244428139 in words is "two hundred forty-four million, four hundred twenty-eight thousand, one hundred thirty-nine".