40159209 has 8 divisors (see below), whose sum is σ = 53602720. Its totient is φ = 26744256.

The previous prime is 40159199. The next prime is 40159211. The reversal of 40159209 is 90295104.

It is a happy number.

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

It is not a de Polignac number, because 40159209 - 2⁵ = 40159177 is a prime.

It is a super-2 number, since 2×40159209² = 3225524135011362, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40159309) 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, 3607 + ... + 9660.

It is an arithmetic number, because the mean of its divisors is an integer number (6700340).

Almost surely, 2^40159209 is an apocalyptic number.

It is an amenable number.

40159209 is a deficient number, since it is larger than the sum of its proper divisors (13443511).

40159209 is a wasteful number, since it uses less digits than its factorization.

40159209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14279.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 40159209 is about 6337.1293974480. The cubic root of 40159209 is about 342.4483279357.

The spelling of 40159209 in words is "forty million, one hundred fifty-nine thousand, two hundred nine".