44021745 has 16 divisors (see below), whose sum is σ = 78261120. Its totient is φ = 23478192.

The previous prime is 44021743. The next prime is 44021771. The reversal of 44021745 is 54712044.

44021745 is a `hidden beast` number, since 440 + 217 + 4 + 5 = 666.

It is not a de Polignac number, because 44021745 - 2¹ = 44021743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (44021743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162909 + ... + 163178.

It is an arithmetic number, because the mean of its divisors is an integer number (4891320).

Almost surely, 2^44021745 is an apocalyptic number.

44021745 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

44021745 is a deficient number, since it is larger than the sum of its proper divisors (34239375).

44021745 is a wasteful number, since it uses less digits than its factorization.

44021745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326101 (or 326095 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 44021745 is about 6634.8884692962. Note that the first 3 decimals coincide. The cubic root of 44021745 is about 353.0929810945.

Adding to 44021745 its reverse (54712044), we get a palindrome (98733789).

The spelling of 44021745 in words is "forty-four million, twenty-one thousand, seven hundred forty-five".