1328388 has 24 divisors (see below), whose sum is σ = 3235008. Its totient is φ = 423456.

The previous prime is 1328387. The next prime is 1328407. The reversal of 1328388 is 8838231.

It is a super-2 number, since 2×1328388² = 3529229357088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2131 + ... + 2682.

It is an arithmetic number, because the mean of its divisors is an integer number (134792).

2^1328388 is an apocalyptic number.

It is an amenable number.

1328388 is an abundant number, since it is smaller than the sum of its proper divisors (1906620).

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

1328388 is a wasteful number, since it uses less digits than its factorization.

1328388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4843 (or 4841 counting only the distinct ones).

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

The square root of 1328388 is about 1152.5571569341. The cubic root of 1328388 is about 109.9279969562.

The spelling of 1328388 in words is "one million, three hundred twenty-eight thousand, three hundred eighty-eight".