39728346815 has 16 divisors (see below), whose sum is σ = 48443573568. Its totient is φ = 31273572096.

The previous prime is 39728346787. The next prime is 39728346841. The reversal of 39728346815 is 51864382793.

It is a cyclic number.

It is not a de Polignac number, because 39728346815 - 2³² = 35433379519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164822 + ... + 326531.

It is an arithmetic number, because the mean of its divisors is an integer number (3027723348).

Almost surely, 2^39728346815 is an apocalyptic number.

39728346815 is a deficient number, since it is larger than the sum of its proper divisors (8715226753).

39728346815 is a wasteful number, since it uses less digits than its factorization.

39728346815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491618.

The product of its digits is 8709120, while the sum is 56.

The spelling of 39728346815 in words is "thirty-nine billion, seven hundred twenty-eight million, three hundred forty-six thousand, eight hundred fifteen".