38905209873 has 20 divisors (see below), whose sum is σ = 58231900980. Its totient is φ = 25885822752.

The previous prime is 38905209851. The next prime is 38905209887. The reversal of 38905209873 is 37890250983.

It is a happy number.

38905209873 is a `hidden beast` number, since 38 + 9 + 0 + 520 + 9 + 87 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 27611471889 + 11293737984 = 166167^2 + 106272^2 .

It is not a de Polignac number, because 38905209873 - 2⁵ = 38905209841 is a prime.

It is a super-2 number, since 2×38905209873² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38905209073) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 430590 + ... + 513047.

It is an arithmetic number, because the mean of its divisors is an integer number (2911595049).

Almost surely, 2^38905209873 is an apocalyptic number.

It is an amenable number.

38905209873 is a deficient number, since it is larger than the sum of its proper divisors (19326691107).

38905209873 is an equidigital number, since it uses as much as digits as its factorization.

38905209873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944158 (or 944149 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 38905209873 in words is "thirty-eight billion, nine hundred five million, two hundred nine thousand, eight hundred seventy-three".