40678009 has 8 divisors (see below), whose sum is σ = 41486472. Its totient is φ = 39876480.

The previous prime is 40678003. The next prime is 40678013. The reversal of 40678009 is 90087604.

It can be written as a sum of positive squares in 4 ways, for example, as 21344400 + 19333609 = 4620^2 + 4397^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40678009 - 2⁷ = 40677881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40678003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11019 + ... + 14239.

It is an arithmetic number, because the mean of its divisors is an integer number (5185809).

Almost surely, 2^40678009 is an apocalyptic number.

It is an amenable number.

40678009 is a deficient number, since it is larger than the sum of its proper divisors (808463).

40678009 is a wasteful number, since it uses less digits than its factorization.

40678009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3467.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 40678009 is about 6377.9314044602. The cubic root of 40678009 is about 343.9166718350.

The spelling of 40678009 in words is "forty million, six hundred seventy-eight thousand, nine".