39685734 has 64 divisors (see below), whose sum is σ = 97666560. Its totient is φ = 11844000.

The previous prime is 39685733. The next prime is 39685747. The reversal of 39685734 is 43758693.

It is a self number, because there is not a number n which added to its sum of digits gives 39685734.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39685733) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41704 + ... + 42644.

It is an arithmetic number, because the mean of its divisors is an integer number (1526040).

Almost surely, 2^39685734 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39685734, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48833280).

39685734 is an abundant number, since it is smaller than the sum of its proper divisors (57980826).

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

39685734 is a wasteful number, since it uses less digits than its factorization.

39685734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034 (or 1028 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 39685734 is about 6299.6614194733. The cubic root of 39685734 is about 341.0971879508.

The spelling of 39685734 in words is "thirty-nine million, six hundred eighty-five thousand, seven hundred thirty-four".