39729698 has 6 divisors (see below), whose sum is σ = 59607921. Its totient is φ = 19860392.

The previous prime is 39729691. The next prime is 39729709. The reversal of 39729698 is 89692793.

It can be written as a sum of positive squares in 2 ways, for example, as 38031889 + 1697809 = 6167^2 + 1303^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=4457.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39729691) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6686 + ... + 11142.

Almost surely, 2^39729698 is an apocalyptic number.

39729698 is a deficient number, since it is larger than the sum of its proper divisors (19878223).

39729698 is an frugal number, since it uses more digits than its factorization.

39729698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8916 (or 4459 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 53.

The square root of 39729698 is about 6303.1498474969. The cubic root of 39729698 is about 341.2230977017.

The spelling of 39729698 in words is "thirty-nine million, seven hundred twenty-nine thousand, six hundred ninety-eight".