44239813 has 4 divisors (see below), whose sum is σ = 44281600. Its totient is φ = 44198028.

The previous prime is 44239807. The next prime is 44239817. The reversal of 44239813 is 31893244.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 44239813 - 2¹⁷ = 44108741 is a prime.

It is a super-2 number, since 2×44239813² = 3914322108549938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44239817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19263 + ... + 21436.

It is an arithmetic number, because the mean of its divisors is an integer number (11070400).

Almost surely, 2^44239813 is an apocalyptic number.

It is an amenable number.

44239813 is a deficient number, since it is larger than the sum of its proper divisors (41787).

44239813 is a wasteful number, since it uses less digits than its factorization.

44239813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41786.

The product of its digits is 20736, while the sum is 34.

The square root of 44239813 is about 6651.3016019423. The cubic root of 44239813 is about 353.6750531916.

The spelling of 44239813 in words is "forty-four million, two hundred thirty-nine thousand, eight hundred thirteen".