1028120580 has 96 divisors (see below), whose sum is σ = 3301831680. Its totient is φ = 265317120.

The previous prime is 1028120573. The next prime is 1028120617. The reversal of 1028120580 is 850218201.

1028120580 is a `hidden beast` number, since 1 + 0 + 2 + 81 + 2 + 0 + 580 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13969 + ... + 47448.

It is an arithmetic number, because the mean of its divisors is an integer number (34394080).

Almost surely, 2^1028120580 is an apocalyptic number.

1028120580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1028120580 is an abundant number, since it is smaller than the sum of its proper divisors (2273711100).

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

1028120580 is a wasteful number, since it uses less digits than its factorization.

1028120580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61466 (or 61458 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 1028120580 is about 32064.3194220617. The cubic root of 1028120580 is about 1009.2870110944.

Adding to 1028120580 its reverse (850218201), we get a palindrome (1878338781).

The spelling of 1028120580 in words is "one billion, twenty-eight million, one hundred twenty thousand, five hundred eighty".