40163869 has 4 divisors (see below), whose sum is σ = 41548860. Its totient is φ = 38778880.

The previous prime is 40163867. The next prime is 40163881. The reversal of 40163869 is 96836104.

40163869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13227769 + 26936100 = 3637^2 + 5190^2 .

It is a cyclic number.

It is not a de Polignac number, because 40163869 - 2¹ = 40163867 is a prime.

It is a super-2 number, since 2×40163869² = 3226272746098322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40163867) 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 3 ways as a sum of consecutive naturals, for example, 692452 + ... + 692509.

It is an arithmetic number, because the mean of its divisors is an integer number (10387215).

Almost surely, 2^40163869 is an apocalyptic number.

It is an amenable number.

40163869 is a deficient number, since it is larger than the sum of its proper divisors (1384991).

40163869 is a wasteful number, since it uses less digits than its factorization.

40163869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384990.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 40163869 is about 6337.4970611433. The cubic root of 40163869 is about 342.4615731126.

The spelling of 40163869 in words is "forty million, one hundred sixty-three thousand, eight hundred sixty-nine".