1028380 has 12 divisors (see below), whose sum is σ = 2159640. Its totient is φ = 411344.

The previous prime is 1028333. The next prime is 1028389. The reversal of 1028380 is 838201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25690 + ... + 25729.

It is an arithmetic number, because the mean of its divisors is an integer number (179970).

2^1028380 is an apocalyptic number.

1028380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1028380 is an abundant number, since it is smaller than the sum of its proper divisors (1131260).

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

1028380 is a wasteful number, since it uses less digits than its factorization.

1028380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51428 (or 51426 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1028380 is about 1014.0907257243. The cubic root of 1028380 is about 100.9371893232.

The spelling of 1028380 in words is "one million, twenty-eight thousand, three hundred eighty".