3138656 has 24 divisors (see below), whose sum is σ = 6325704. Its totient is φ = 1532160.

The previous prime is 3138647. The next prime is 3138661. The reversal of 3138656 is 6568313.

3138656 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 2×3138656² = 19702322972672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236 + ... + 2516.

It is an arithmetic number, because the mean of its divisors is an integer number (263571).

Almost surely, 2^3138656 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 3138656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3162852).

3138656 is an abundant number, since it is smaller than the sum of its proper divisors (3187048).

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

3138656 is a wasteful number, since it uses less digits than its factorization.

3138656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2334 (or 2326 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 3138656 is about 1771.6252425386. The cubic root of 3138656 is about 146.4135395124.

The spelling of 3138656 in words is "three million, one hundred thirty-eight thousand, six hundred fifty-six".