38923691729 has 16 divisors (see below), whose sum is σ = 45151325184. Its totient is φ = 33258772800.

The previous prime is 38923691713. The next prime is 38923691731. The reversal of 38923691729 is 92719632983.

It is not a de Polignac number, because 38923691729 - 2⁴ = 38923691713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (38923691029) 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, 2090402 + ... + 2108939.

It is an arithmetic number, because the mean of its divisors is an integer number (2821957824).

Almost surely, 2^38923691729 is an apocalyptic number.

It is an amenable number.

38923691729 is a deficient number, since it is larger than the sum of its proper divisors (6227633455).

38923691729 is a wasteful number, since it uses less digits than its factorization.

38923691729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4199408.

The product of its digits is 8817984, while the sum is 59.

The spelling of 38923691729 in words is "thirty-eight billion, nine hundred twenty-three million, six hundred ninety-one thousand, seven hundred twenty-nine".