44140021 has 8 divisors (see below), whose sum is σ = 46548320. Its totient is φ = 41740272.

The previous prime is 44140009. The next prime is 44140039. The reversal of 44140021 is 12004144.

44140021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 44140021 - 2⁹ = 44139509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 44139977 and 44140004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44140081) 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, 10411 + ... + 14023.

It is an arithmetic number, because the mean of its divisors is an integer number (5818540).

Almost surely, 2^44140021 is an apocalyptic number.

It is an amenable number.

44140021 is a deficient number, since it is larger than the sum of its proper divisors (2408299).

44140021 is a wasteful number, since it uses less digits than its factorization.

44140021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4275.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 44140021 is about 6643.7956771713. The cubic root of 44140021 is about 353.4089240393.

Adding to 44140021 its reverse (12004144), we get a palindrome (56144165).

The spelling of 44140021 in words is "forty-four million, one hundred forty thousand, twenty-one".