40839218 has 16 divisors (see below), whose sum is σ = 70269504. Its totient is φ = 17437680.

The previous prime is 40839209. The next prime is 40839223. The reversal of 40839218 is 81293804.

It is a happy number.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1388 + ... + 9143.

It is an arithmetic number, because the mean of its divisors is an integer number (4391844).

Almost surely, 2^40839218 is an apocalyptic number.

40839218 is a deficient number, since it is larger than the sum of its proper divisors (29430286).

40839218 is a wasteful number, since it uses less digits than its factorization.

40839218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10817.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 40839218 is about 6390.5569397354. The cubic root of 40839218 is about 344.3703926907.

The spelling of 40839218 in words is "forty million, eight hundred thirty-nine thousand, two hundred eighteen".