40798009 has 4 divisors (see below), whose sum is σ = 46626304. Its totient is φ = 34969716.

The previous prime is 40798007. The next prime is 40798019. The reversal of 40798009 is 90089704.

It is a happy number.

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 40798009 - 2¹ = 40798007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40798001) 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, 2914137 + ... + 2914150.

It is an arithmetic number, because the mean of its divisors is an integer number (11656576).

Almost surely, 2^40798009 is an apocalyptic number.

It is an amenable number.

40798009 is a deficient number, since it is larger than the sum of its proper divisors (5828295).

40798009 is an equidigital number, since it uses as much as digits as its factorization.

40798009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5828294.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 40798009 is about 6387.3319155967. The cubic root of 40798009 is about 344.2545242020.

The spelling of 40798009 in words is "forty million, seven hundred ninety-eight thousand, nine".