38728209811 has 8 divisors (see below), whose sum is σ = 39108517344. Its totient is φ = 38347985280.

The previous prime is 38728209757. The next prime is 38728209851. The reversal of 38728209811 is 11890282783.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38728209811 - 2⁷ = 38728209683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38728209851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1372101 + ... + 1400041.

It is an arithmetic number, because the mean of its divisors is an integer number (4888564668).

Almost surely, 2^38728209811 is an apocalyptic number.

38728209811 is a deficient number, since it is larger than the sum of its proper divisors (380307533).

38728209811 is a wasteful number, since it uses less digits than its factorization.

38728209811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41501.

The product of its (nonzero) digits is 387072, while the sum is 49.

The spelling of 38728209811 in words is "thirty-eight billion, seven hundred twenty-eight million, two hundred nine thousand, eight hundred eleven".