3138828 has 96 divisors (see below), whose sum is σ = 9461760. Its totient is φ = 786240.

The previous prime is 3138809. The next prime is 3138847. The reversal of 3138828 is 8288313.

It is an interprime number because it is at equal distance from previous prime (3138809) and next prime (3138847).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39693 + ... + 39771.

It is an arithmetic number, because the mean of its divisors is an integer number (98560).

Almost surely, 2^3138828 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 3138828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4730880).

3138828 is an abundant number, since it is smaller than the sum of its proper divisors (6322932).

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

3138828 is a wasteful number, since it uses less digits than its factorization.

3138828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 145 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 3138828 is about 1771.6737848712. The cubic root of 3138828 is about 146.4162139766.

It can be divided in two parts, 3 and 138828, that added together give a palindrome (138831).

The spelling of 3138828 in words is "three million, one hundred thirty-eight thousand, eight hundred twenty-eight".