39640029 has 16 divisors (see below), whose sum is σ = 62094144. Its totient is φ = 22176000.

The previous prime is 39640001. The next prime is 39640043. The reversal of 39640029 is 92004693.

It is not a de Polignac number, because 39640029 - 2⁵ = 39639997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39640079) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 45772 + ... + 46629.

It is an arithmetic number, because the mean of its divisors is an integer number (3880884).

Almost surely, 2^39640029 is an apocalyptic number.

39640029 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

39640029 is a deficient number, since it is larger than the sum of its proper divisors (22454115).

39640029 is a wasteful number, since it uses less digits than its factorization.

39640029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92428.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 39640029 is about 6296.0327985169. The cubic root of 39640029 is about 340.9661934764.

The spelling of 39640029 in words is "thirty-nine million, six hundred forty thousand, twenty-nine".