3138540 has 72 divisors (see below), whose sum is σ = 9386832. Its totient is φ = 783360.

The previous prime is 3138539. The next prime is 3138547. The reversal of 3138540 is 458313.

It is a self number, because there is not a number n which added to its sum of digits gives 3138540.

It is not an unprimeable number, because it can be changed into a prime (3138547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17250 + ... + 17430.

Almost surely, 2^3138540 is an apocalyptic number.

3138540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3138540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4693416).

3138540 is an abundant number, since it is smaller than the sum of its proper divisors (6248292).

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

3138540 is a wasteful number, since it uses less digits than its factorization.

3138540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 3138540 is about 1771.5925039354. The cubic root of 3138540 is about 146.4117357489.

The spelling of 3138540 in words is "three million, one hundred thirty-eight thousand, five hundred forty".