40784809 has 8 divisors (see below), whose sum is σ = 45339392. Its totient is φ = 36432720.

The previous prime is 40784801. The next prime is 40784813. The reversal of 40784809 is 90848704.

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 40784809 - 2³ = 40784801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40784801) 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, 50199 + ... + 51004.

It is an arithmetic number, because the mean of its divisors is an integer number (5667424).

Almost surely, 2^40784809 is an apocalyptic number.

It is an amenable number.

40784809 is a deficient number, since it is larger than the sum of its proper divisors (4554583).

40784809 is a wasteful number, since it uses less digits than its factorization.

40784809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101247.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 40784809 is about 6386.2985367112. The cubic root of 40784809 is about 344.2173928975.

The spelling of 40784809 in words is "forty million, seven hundred eighty-four thousand, eight hundred nine".