40346509 has 4 divisors (see below), whose sum is σ = 46110304. Its totient is φ = 34582716.

The previous prime is 40346497. The next prime is 40346521. The reversal of 40346509 is 90564304.

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 an interprime number because it is at equal distance from previous prime (40346497) and next prime (40346521).

It is not a de Polignac number, because 40346509 - 2⁵ = 40346477 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 (40346309) 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, 2881887 + ... + 2881900.

It is an arithmetic number, because the mean of its divisors is an integer number (11527576).

Almost surely, 2^40346509 is an apocalyptic number.

It is an amenable number.

40346509 is a deficient number, since it is larger than the sum of its proper divisors (5763795).

40346509 is an equidigital number, since it uses as much as digits as its factorization.

40346509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5763794.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 40346509 is about 6351.8901911163. The cubic root of 40346509 is about 342.9798881526.

The spelling of 40346509 in words is "forty million, three hundred forty-six thousand, five hundred nine".