39956069 has 16 divisors (see below), whose sum is σ = 45002880. Its totient is φ = 35251200.

The previous prime is 39956057. The next prime is 39956087. The reversal of 39956069 is 96065993.

39956069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 39956069 - 2⁸ = 39955813 is a prime.

It is a super-2 number, since 2×39956069² = 3192974899865522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39956089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32669 + ... + 33869.

It is an arithmetic number, because the mean of its divisors is an integer number (2812680).

Almost surely, 2^39956069 is an apocalyptic number.

It is an amenable number.

39956069 is a deficient number, since it is larger than the sum of its proper divisors (5046811).

39956069 is a wasteful number, since it uses less digits than its factorization.

39956069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340.

The product of its (nonzero) digits is 393660, while the sum is 47.

The square root of 39956069 is about 6321.0813157244. The cubic root of 39956069 is about 341.8699418832.

The spelling of 39956069 in words is "thirty-nine million, nine hundred fifty-six thousand, sixty-nine".