40159869 has 8 divisors (see below), whose sum is σ = 54852672. Its totient is φ = 26120160.

The previous prime is 40159859. The next prime is 40159871. The reversal of 40159869 is 96895104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40159869 - 2⁴ = 40159853 is a prime.

It is a super-2 number, since 2×40159869² = 3225630156194322, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40159869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40159859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163129 + ... + 163374.

It is an arithmetic number, because the mean of its divisors is an integer number (6856584).

Almost surely, 2^40159869 is an apocalyptic number.

It is an amenable number.

40159869 is a deficient number, since it is larger than the sum of its proper divisors (14692803).

40159869 is a wasteful number, since it uses less digits than its factorization.

40159869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326547.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 40159869 is about 6337.1814712852. The cubic root of 40159869 is about 342.4502039243.

The spelling of 40159869 in words is "forty million, one hundred fifty-nine thousand, eight hundred sixty-nine".