44145405 has 20 divisors (see below), whose sum is σ = 79135452. Its totient is φ = 23544000.

The previous prime is 44145389. The next prime is 44145407. The reversal of 44145405 is 50454144.

It can be written as a sum of positive squares in 2 ways, for example, as 16990884 + 27154521 = 4122^2 + 5211^2 .

It is not a de Polignac number, because 44145405 - 2⁴ = 44145389 is a prime.

It is a super-2 number, since 2×44145405² = 3897633565228050, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44145407) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 54096 + ... + 54905.

Almost surely, 2^44145405 is an apocalyptic number.

44145405 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

44145405 is a deficient number, since it is larger than the sum of its proper divisors (34990047).

44145405 is a wasteful number, since it uses less digits than its factorization.

44145405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109018 (or 109009 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 44145405 is about 6644.2008548809. The cubic root of 44145405 is about 353.4232925288.

Adding to 44145405 its reverse (50454144), we get a palindrome (94599549).

The spelling of 44145405 in words is "forty-four million, one hundred forty-five thousand, four hundred five".