1028140 has 12 divisors (see below), whose sum is σ = 2159136. Its totient is φ = 411248.

The previous prime is 1028129. The next prime is 1028141. The reversal of 1028140 is 418201.

It is a happy number.

1028140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1028141) 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, 25684 + ... + 25723.

It is an arithmetic number, because the mean of its divisors is an integer number (179928).

2^1028140 is an apocalyptic number.

1028140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1028140 is an abundant number, since it is smaller than the sum of its proper divisors (1130996).

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

1028140 is a wasteful number, since it uses less digits than its factorization.

1028140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51416 (or 51414 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1028140 is about 1013.9723862118. The cubic root of 1028140 is about 100.9293365806.

The spelling of 1028140 in words is "one million, twenty-eight thousand, one hundred forty".