1028125980 has 384 divisors, whose sum is σ = 3861043200. Its totient is φ = 222179328.

The previous prime is 1028125939. The next prime is 1028125991. The reversal of 1028125980 is 895218201.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 9098404 + ... + 9098516.

It is an arithmetic number, because the mean of its divisors is an integer number (10054800).

Almost surely, 2^1028125980 is an apocalyptic number.

1028125980 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 1028125980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1930521600).

1028125980 is an abundant number, since it is smaller than the sum of its proper divisors (2832917220).

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

1028125980 is a wasteful number, since it uses less digits than its factorization.

1028125980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 242 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 1028125980 is about 32064.4036276991. The cubic root of 1028125980 is about 1009.2887781181.

The spelling of 1028125980 in words is "one billion, twenty-eight million, one hundred twenty-five thousand, nine hundred eighty".