3138940044 has 36 divisors (see below), whose sum is σ = 8401282344. Its totient is φ = 984765312.

The previous prime is 3138940043. The next prime is 3138940069. The reversal of 3138940044 is 4400498313.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 3138939990 and 3138940008.

It is not an unprimeable number, because it can be changed into a prime (3138940043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2563882 + ... + 2565105.

It is an arithmetic number, because the mean of its divisors is an integer number (233368954).

Almost surely, 2^3138940044 is an apocalyptic number.

3138940044 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

3138940044 is an abundant number, since it is smaller than the sum of its proper divisors (5262342300).

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

3138940044 is a wasteful number, since it uses less digits than its factorization.

3138940044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5129014 (or 5129009 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 3138940044 is about 56026.2442432116. The cubic root of 3138940044 is about 1464.1795611971.

The spelling of 3138940044 in words is "three billion, one hundred thirty-eight million, nine hundred forty thousand, forty-four".