40623309 has 16 divisors (see below), whose sum is σ = 60807040. Its totient is φ = 26801280.

The previous prime is 40623293. The next prime is 40623343. The reversal of 40623309 is 90332604.

40623309 is a `hidden beast` number, since 4 + 0 + 623 + 30 + 9 = 666.

It is not a de Polignac number, because 40623309 - 2⁴ = 40623293 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40623389) 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, 5137 + ... + 10374.

It is an arithmetic number, because the mean of its divisors is an integer number (3800440).

Almost surely, 2^40623309 is an apocalyptic number.

It is an amenable number.

40623309 is a deficient number, since it is larger than the sum of its proper divisors (20183731).

40623309 is a wasteful number, since it uses less digits than its factorization.

40623309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15617 (or 15611 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 40623309 is about 6373.6417376567. The cubic root of 40623309 is about 343.7624469763.

The spelling of 40623309 in words is "forty million, six hundred twenty-three thousand, three hundred nine".