39706730 has 64 divisors (see below), whose sum is σ = 88065792. Its totient is φ = 12579840.

The previous prime is 39706721. The next prime is 39706741. The reversal of 39706730 is 3760793.

39706730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 72317 + ... + 72863.

It is an arithmetic number, because the mean of its divisors is an integer number (1376028).

Almost surely, 2^39706730 is an apocalyptic number.

39706730 is an abundant number, since it is smaller than the sum of its proper divisors (48359062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39706730 is a wasteful number, since it uses less digits than its factorization.

39706730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639.

The product of its (nonzero) digits is 23814, while the sum is 35.

The square root of 39706730 is about 6301.3276378871. The cubic root of 39706730 is about 341.1573305868.

The spelling of 39706730 in words is "thirty-nine million, seven hundred six thousand, seven hundred thirty".