1380128 has 48 divisors (see below), whose sum is σ = 2993760. Its totient is φ = 623616.

The previous prime is 1380083. The next prime is 1380149. The reversal of 1380128 is 8210831.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23363 + ... + 23421.

It is an arithmetic number, because the mean of its divisors is an integer number (62370).

2^1380128 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 1380128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1496880).

1380128 is an abundant number, since it is smaller than the sum of its proper divisors (1613632).

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

1380128 is a wasteful number, since it uses less digits than its factorization.

1380128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 1380128 is about 1174.7884916018. The cubic root of 1380128 is about 111.3370702448.

Adding to 1380128 its reverse (8210831), we get a palindrome (9590959).

The spelling of 1380128 in words is "one million, three hundred eighty thousand, one hundred twenty-eight".