40294509 has 4 divisors (see below), whose sum is σ = 53726016. Its totient is φ = 26863004.

The previous prime is 40294489. The next prime is 40294523. The reversal of 40294509 is 90549204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40294509 - 2¹⁹ = 39770221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40294509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40294549) 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, 6715749 + ... + 6715754.

It is an arithmetic number, because the mean of its divisors is an integer number (13431504).

Almost surely, 2^40294509 is an apocalyptic number.

It is an amenable number.

40294509 is a deficient number, since it is larger than the sum of its proper divisors (13431507).

40294509 is a wasteful number, since it uses less digits than its factorization.

40294509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13431506.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 40294509 is about 6347.7956016242. The cubic root of 40294509 is about 342.8324766233.

The spelling of 40294509 in words is "forty million, two hundred ninety-four thousand, five hundred nine".