39987492138 has 48 divisors (see below), whose sum is σ = 96065360352. Its totient is φ = 11918772000.

The previous prime is 39987492119. The next prime is 39987492203. The reversal of 39987492138 is 83129478993.

39987492138 is a `hidden beast` number, since 3 + 9 + 9 + 8 + 7 + 492 + 138 = 666.

39987492138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×39987492138² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1643308 + ... + 1667463.

It is an arithmetic number, because the mean of its divisors is an integer number (2001361674).

Almost surely, 2^39987492138 is an apocalyptic number.

39987492138 is an abundant number, since it is smaller than the sum of its proper divisors (56077868214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39987492138 is a wasteful number, since it uses less digits than its factorization.

39987492138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3310851 (or 3310848 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The spelling of 39987492138 in words is "thirty-nine billion, nine hundred eighty-seven million, four hundred ninety-two thousand, one hundred thirty-eight".