40242109 has 8 divisors (see below), whose sum is σ = 41507840. Its totient is φ = 38991456.

The previous prime is 40242079. The next prime is 40242113. The reversal of 40242109 is 90124204.

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

It is a cyclic number.

It is not a de Polignac number, because 40242109 - 2²³ = 31853501 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40242109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40242119) 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, 1777 + ... + 9145.

It is an arithmetic number, because the mean of its divisors is an integer number (5188480).

Almost surely, 2^40242109 is an apocalyptic number.

It is an amenable number.

40242109 is a deficient number, since it is larger than the sum of its proper divisors (1265731).

40242109 is a wasteful number, since it uses less digits than its factorization.

40242109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7539.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 40242109 is about 6343.6668418195. Note that the first 3 decimals coincide. The cubic root of 40242109 is about 342.6838028132.

The spelling of 40242109 in words is "forty million, two hundred forty-two thousand, one hundred nine".