38728591933 has 4 divisors (see below), whose sum is σ = 38821023360. Its totient is φ = 38636160508.

The previous prime is 38728591931. The next prime is 38728592027. The reversal of 38728591933 is 33919582783.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33919582783 = 127 ⋅267083329.

It is a cyclic number.

It is not a de Polignac number, because 38728591933 - 2¹ = 38728591931 is a prime.

It is a super-2 number, since 2×38728591933² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38728591931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46215085 + ... + 46215922.

It is an arithmetic number, because the mean of its divisors is an integer number (9705255840).

Almost surely, 2^38728591933 is an apocalyptic number.

It is an amenable number.

38728591933 is a deficient number, since it is larger than the sum of its proper divisors (92431427).

38728591933 is an equidigital number, since it uses as much as digits as its factorization.

38728591933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92431426.

The product of its digits is 9797760, while the sum is 58.

The spelling of 38728591933 in words is "thirty-eight billion, seven hundred twenty-eight million, five hundred ninety-one thousand, nine hundred thirty-three".