39138531044 has 24 divisors (see below), whose sum is σ = 72543794400. Its totient is φ = 18412443776.

The previous prime is 39138531031. The next prime is 39138531059. The reversal of 39138531044 is 44013583193.

39138531044 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 2×39138531044² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 39138530992 and 39138531010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137099 + ... + 311565.

It is an arithmetic number, because the mean of its divisors is an integer number (3022658100).

Almost surely, 2^39138531044 is an apocalyptic number.

39138531044 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

39138531044 is a deficient number, since it is larger than the sum of its proper divisors (33405263356).

39138531044 is a wasteful number, since it uses less digits than its factorization.

39138531044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177787 (or 177785 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 39138531044 in words is "thirty-nine billion, one hundred thirty-eight million, five hundred thirty-one thousand, forty-four".