44021405 has 12 divisors (see below), whose sum is σ = 53393340. Its totient is φ = 34842624.

The previous prime is 44021401. The next prime is 44021431. The reversal of 44021405 is 50412044.

It can be written as a sum of positive squares in 2 ways, for example, as 16532356 + 27489049 = 4066^2 + 5243^2 .

It is not a de Polignac number, because 44021405 - 2² = 44021401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44021401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56861 + ... + 57629.

It is an arithmetic number, because the mean of its divisors is an integer number (4449445).

Almost surely, 2^44021405 is an apocalyptic number.

It is an amenable number.

44021405 is a deficient number, since it is larger than the sum of its proper divisors (9371935).

44021405 is an equidigital number, since it uses as much as digits as its factorization.

44021405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988 (or 881 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 44021405 is about 6634.8628471130. The cubic root of 44021405 is about 353.0920720595.

Adding to 44021405 its reverse (50412044), we get a palindrome (94433449).

The spelling of 44021405 in words is "forty-four million, twenty-one thousand, four hundred five".