40072109 has 16 divisors (see below), whose sum is σ = 50651520. Its totient is φ = 30792960.

The previous prime is 40072103. The next prime is 40072117. The reversal of 40072109 is 90127004.

It is not a de Polignac number, because 40072109 - 2⁴ = 40072093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40072103) 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, 2057 + ... + 9185.

It is an arithmetic number, because the mean of its divisors is an integer number (3165720).

Almost surely, 2^40072109 is an apocalyptic number.

It is an amenable number.

40072109 is a deficient number, since it is larger than the sum of its proper divisors (10579411).

40072109 is a wasteful number, since it uses less digits than its factorization.

40072109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7220.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 40072109 is about 6330.2534704386. The cubic root of 40072109 is about 342.2005737268.

It can be divided in two parts, 4007 and 2109, that added together give a palindrome (6116).

The spelling of 40072109 in words is "forty million, seventy-two thousand, one hundred nine".