39904859871 has 20 divisors (see below), whose sum is σ = 60997270312. Its totient is φ = 25984557648.

The previous prime is 39904859843. The next prime is 39904859887. The reversal of 39904859871 is 17895840993.

39904859871 is a `hidden beast` number, since 39 + 9 + 0 + 4 + 8 + 598 + 7 + 1 = 666.

It is not a de Polignac number, because 39904859871 - 2¹⁴ = 39904843487 is a prime.

It is a super-2 number, since 2×39904859871² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39904859799 and 39904859808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39904859671) 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, 5725036 + ... + 5732001.

Almost surely, 2^39904859871 is an apocalyptic number.

39904859871 is a deficient number, since it is larger than the sum of its proper divisors (21092410441).

39904859871 is a wasteful number, since it uses less digits than its factorization.

39904859871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11457092 (or 11457083 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 63.

The spelling of 39904859871 in words is "thirty-nine billion, nine hundred four million, eight hundred fifty-nine thousand, eight hundred seventy-one".