39940813235 has 8 divisors (see below), whose sum is σ = 50451553680. Its totient is φ = 30270932064.

The previous prime is 39940813229. The next prime is 39940813249. The reversal of 39940813235 is 53231804993.

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 39940813235 - 2⁴ = 39940813219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39940813235.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210214712 + ... + 210214901.

It is an arithmetic number, because the mean of its divisors is an integer number (6306444210).

Almost surely, 2^39940813235 is an apocalyptic number.

39940813235 is a deficient number, since it is larger than the sum of its proper divisors (10510740445).

39940813235 is a wasteful number, since it uses less digits than its factorization.

39940813235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420429637.

The product of its (nonzero) digits is 699840, while the sum is 47.

The spelling of 39940813235 in words is "thirty-nine billion, nine hundred forty million, eight hundred thirteen thousand, two hundred thirty-five".