40394109 has 16 divisors (see below), whose sum is σ = 62716032. Its totient is φ = 22646208.

The previous prime is 40394093. The next prime is 40394111. The reversal of 40394109 is 90149304.

It is not a de Polignac number, because 40394109 - 2⁴ = 40394093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40394119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17034 + ... + 19259.

It is an arithmetic number, because the mean of its divisors is an integer number (3919752).

Almost surely, 2^40394109 is an apocalyptic number.

It is an amenable number.

40394109 is a deficient number, since it is larger than the sum of its proper divisors (22321923).

40394109 is a wasteful number, since it uses less digits than its factorization.

40394109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36356.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 40394109 is about 6355.6360027931. The cubic root of 40394109 is about 343.1147154027.

The spelling of 40394109 in words is "forty million, three hundred ninety-four thousand, one hundred nine".