3138784 has 48 divisors (see below), whose sum is σ = 6952176. Its totient is φ = 1382400.

The previous prime is 3138769. The next prime is 3138791. The reversal of 3138784 is 4878313.

3138784 is nontrivially palindromic in base 15.

It is a congruent number.

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, 12904 + ... + 13144.

It is an arithmetic number, because the mean of its divisors is an integer number (144837).

Almost surely, 2^3138784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3138784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3476088).

3138784 is an abundant number, since it is smaller than the sum of its proper divisors (3813392).

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

3138784 is a wasteful number, since it uses less digits than its factorization.

3138784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299 (or 291 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 3138784 is about 1771.6613671918. The cubic root of 3138784 is about 146.4155298206.

The spelling of 3138784 in words is "three million, one hundred thirty-eight thousand, seven hundred eighty-four".