3138560 has 44 divisors (see below), whose sum is σ = 7541148. Its totient is φ = 1253376.

The previous prime is 3138559. The next prime is 3138563. The reversal of 3138560 is 658313.

It can be written as a sum of positive squares in 2 ways, for example, as 369664 + 2768896 = 608^2 + 1664^2 .

It is not an unprimeable number, because it can be changed into a prime (3138563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4814 + ... + 5426.

Almost surely, 2^3138560 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 3138560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3770574).

3138560 is an abundant number, since it is smaller than the sum of its proper divisors (4402588).

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

3138560 is an equidigital number, since it uses as much as digits as its factorization.

3138560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638 (or 620 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 3138560 is about 1771.5981485653. The cubic root of 3138560 is about 146.4120467458.

The spelling of 3138560 in words is "three million, one hundred thirty-eight thousand, five hundred sixty".