44642309 has 4 divisors (see below), whose sum is σ = 44659404. Its totient is φ = 44625216.

The previous prime is 44642243. The next prime is 44642327. The reversal of 44642309 is 90324644.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21390625 + 23251684 = 4625^2 + 4822^2 .

It is a cyclic number.

It is not a de Polignac number, because 44642309 - 2¹² = 44638213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44642329) 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, 3722 + ... + 10155.

It is an arithmetic number, because the mean of its divisors is an integer number (11164851).

Almost surely, 2^44642309 is an apocalyptic number.

It is an amenable number.

44642309 is a deficient number, since it is larger than the sum of its proper divisors (17095).

44642309 is a wasteful number, since it uses less digits than its factorization.

44642309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17094.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 44642309 is about 6681.4900284293. The cubic root of 44642309 is about 354.7444010828.

It can be divided in two parts, 44642 and 309, that multiplied together give a triangular number (13794378 = T₅₂₅₂).

The spelling of 44642309 in words is "forty-four million, six hundred forty-two thousand, three hundred nine".