39408999290 has 24 divisors (see below), whose sum is σ = 73466637660. Its totient is φ = 15220024064.

The previous prime is 39408999277. The next prime is 39408999299. The reversal of 39408999290 is 9299980493.

It is a Cunningham number, because it is equal to 198517²+1.

It can be written as a sum of positive squares in 6 ways, for example, as 14187430321 + 25221568969 = 119111^2 + 158813^2 .

It is not an unprimeable number, because it can be changed into a prime (39408999299) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2334575 + ... + 2351394.

Almost surely, 2^39408999290 is an apocalyptic number.

39408999290 is a deficient number, since it is larger than the sum of its proper divisors (34057638370).

39408999290 is a wasteful number, since it uses less digits than its factorization.

39408999290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4686034 (or 4686005 counting only the distinct ones).

The product of its (nonzero) digits is 11337408, while the sum is 62.

The spelling of 39408999290 in words is "thirty-nine billion, four hundred eight million, nine hundred ninety-nine thousand, two hundred ninety".