38538872217 has 48 divisors (see below), whose sum is σ = 57936383232. Its totient is φ = 24665472000.

The previous prime is 38538872189. The next prime is 38538872219. The reversal of 38538872217 is 71227883583.

38538872217 is a `hidden beast` number, since 3 + 8 + 538 + 87 + 2 + 21 + 7 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-38538872217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38538872219) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11852842 + ... + 11856092.

It is an arithmetic number, because the mean of its divisors is an integer number (1207007984).

Almost surely, 2^38538872217 is an apocalyptic number.

38538872217 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

38538872217 is a deficient number, since it is larger than the sum of its proper divisors (19397511015).

38538872217 is a wasteful number, since it uses less digits than its factorization.

38538872217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3758 (or 3755 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 54.

The spelling of 38538872217 in words is "thirty-eight billion, five hundred thirty-eight million, eight hundred seventy-two thousand, two hundred seventeen".