40226509 has 4 divisors (see below), whose sum is σ = 41613660. Its totient is φ = 38839360.

The previous prime is 40226507. The next prime is 40226513. The reversal of 40226509 is 90562204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18576100 + 21650409 = 4310^2 + 4653^2 .

It is a cyclic number.

It is not a de Polignac number, because 40226509 - 2¹ = 40226507 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 (40226507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 693532 + ... + 693589.

It is an arithmetic number, because the mean of its divisors is an integer number (10403415).

Almost surely, 2^40226509 is an apocalyptic number.

It is an amenable number.

40226509 is a deficient number, since it is larger than the sum of its proper divisors (1387151).

40226509 is a wasteful number, since it uses less digits than its factorization.

40226509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387150.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 40226509 is about 6342.4371498660. The cubic root of 40226509 is about 342.6395162157.

The spelling of 40226509 in words is "forty million, two hundred twenty-six thousand, five hundred nine".