40116309 has 16 divisors (see below), whose sum is σ = 55598400. Its totient is φ = 25698176.

The previous prime is 40116299. The next prime is 40116319. The reversal of 40116309 is 90361104.

It is an interprime number because it is at equal distance from previous prime (40116299) and next prime (40116319).

It is not a de Polignac number, because 40116309 - 2⁸ = 40116053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40116319) 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, 19282 + ... + 21260.

It is an arithmetic number, because the mean of its divisors is an integer number (3474900).

Almost surely, 2^40116309 is an apocalyptic number.

It is an amenable number.

40116309 is a deficient number, since it is larger than the sum of its proper divisors (15482091).

40116309 is a wasteful number, since it uses less digits than its factorization.

40116309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 40116309 is about 6333.7436796890. The cubic root of 40116309 is about 342.3263445603.

The spelling of 40116309 in words is "forty million, one hundred sixteen thousand, three hundred nine".