39664629 has 24 divisors (see below), whose sum is σ = 59185152. Its totient is φ = 25578720.

The previous prime is 39664613. The next prime is 39664631. The reversal of 39664629 is 92646693.

It is not a de Polignac number, because 39664629 - 2⁴ = 39664613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39664649) 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 23 ways as a sum of consecutive naturals, for example, 103372 + ... + 103754.

It is an arithmetic number, because the mean of its divisors is an integer number (2466048).

Almost surely, 2^39664629 is an apocalyptic number.

It is an amenable number.

39664629 is a deficient number, since it is larger than the sum of its proper divisors (19520523).

39664629 is a wasteful number, since it uses less digits than its factorization.

39664629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737 (or 734 counting only the distinct ones).

The product of its digits is 419904, while the sum is 45.

The square root of 39664629 is about 6297.9861066852. The cubic root of 39664629 is about 341.0367117047.

It can be divided in two parts, 396 and 64629, that added together give a square (65025 = 255²).

The spelling of 39664629 in words is "thirty-nine million, six hundred sixty-four thousand, six hundred twenty-nine".