39728870689 has 16 divisors (see below), whose sum is σ = 40597179264. Its totient is φ = 38869891200.

The previous prime is 39728870683. The next prime is 39728870693. The reversal of 39728870689 is 98607882793.

It is a cyclic number.

It is not a de Polignac number, because 39728870689 - 2²⁵ = 39695316257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39728870683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8943709 + ... + 8948149.

It is an arithmetic number, because the mean of its divisors is an integer number (2537323704).

Almost surely, 2^39728870689 is an apocalyptic number.

It is an amenable number.

39728870689 is a deficient number, since it is larger than the sum of its proper divisors (868308575).

39728870689 is a wasteful number, since it uses less digits than its factorization.

39728870689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5448.

The product of its (nonzero) digits is 73156608, while the sum is 67.

The spelling of 39728870689 in words is "thirty-nine billion, seven hundred twenty-eight million, eight hundred seventy thousand, six hundred eighty-nine".