1028580 has 96 divisors (see below), whose sum is σ = 3440640. Its totient is φ = 224640.
The previous prime is 1028579. The next prime is 1028581. The reversal of 1028580 is 858201.
It is an interprime number because it is at equal distance from previous prime (1028579) and next prime (1028581).
It is a self number, because there is not a number n which added to its sum of digits gives 1028580.
It is not an unprimeable number, because it can be changed into a prime (1028581) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12981 + ... + 13059.
It is an arithmetic number, because the mean of its divisors is an integer number (35840).
21028580 is an apocalyptic number.
1028580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 1028580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1720320).
1028580 is an abundant number, since it is smaller than the sum of its proper divisors (2412060).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1028580 is a wasteful number, since it uses less digits than its factorization.
1028580 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 129 (or 127 counting only the distinct ones).
The product of its (nonzero) digits is 640, while the sum is 24.
The square root of 1028580 is about 1014.1893314367. The cubic root of 1028580 is about 100.9437323421.
The spelling of 1028580 in words is "one million, twenty-eight thousand, five hundred eighty".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.063 sec. • engine limits •