39989811 has 16 divisors (see below), whose sum is σ = 55677600. Its totient is φ = 25498368.

The previous prime is 39989791. The next prime is 39989837. The reversal of 39989811 is 11898993.

It is not a de Polignac number, because 39989811 - 2¹¹ = 39987763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39989311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7375 + ... + 11591.

It is an arithmetic number, because the mean of its divisors is an integer number (3479850).

Almost surely, 2^39989811 is an apocalyptic number.

39989811 is a deficient number, since it is larger than the sum of its proper divisors (15687789).

39989811 is a wasteful number, since it uses less digits than its factorization.

39989811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4358.

The product of its digits is 139968, while the sum is 48.

The square root of 39989811 is about 6323.7497578573. The cubic root of 39989811 is about 341.9661486279.

The spelling of 39989811 in words is "thirty-nine million, nine hundred eighty-nine thousand, eight hundred eleven".