40839929 has 8 divisors (see below), whose sum is σ = 44033472. Its totient is φ = 37653840.

The previous prime is 40839889. The next prime is 40839941. The reversal of 40839929 is 92993804.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40839929 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40839929.

It is not an unprimeable number, because it can be changed into a prime (40839979) 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, 15734 + ... + 18144.

It is an arithmetic number, because the mean of its divisors is an integer number (5504184).

Almost surely, 2^40839929 is an apocalyptic number.

It is an amenable number.

40839929 is a deficient number, since it is larger than the sum of its proper divisors (3193543).

40839929 is a wasteful number, since it uses less digits than its factorization.

40839929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3727.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 40839929 is about 6390.6125684476. The cubic root of 40839929 is about 344.3723911450.

The spelling of 40839929 in words is "forty million, eight hundred thirty-nine thousand, nine hundred twenty-nine".