40440169 has 16 divisors (see below), whose sum is σ = 50918400. Its totient is φ = 31199760.

The previous prime is 40440157. The next prime is 40440203. The reversal of 40440169 is 96104404.

It is a cyclic number.

It is not a de Polignac number, because 40440169 - 2¹³ = 40431977 is a prime.

It is a super-2 number, since 2×40440169² = 3270814537497122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40440119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5382 + ... + 10480.

It is an arithmetic number, because the mean of its divisors is an integer number (3182400).

Almost surely, 2^40440169 is an apocalyptic number.

It is an amenable number.

40440169 is a deficient number, since it is larger than the sum of its proper divisors (10478231).

40440169 is a wasteful number, since it uses less digits than its factorization.

40440169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5220.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 40440169 is about 6359.2585259604. The cubic root of 40440169 is about 343.2450797976.

The spelling of 40440169 in words is "forty million, four hundred forty thousand, one hundred sixty-nine".