1028457750 has 64 divisors (see below), whose sum is σ = 2592637632. Its totient is φ = 271520000.

The previous prime is 1028457709. The next prime is 1028457751. The reversal of 1028457750 is 577548201.

It is a junction number, because it is equal to n+sod(n) for n = 1028457699 and 1028457708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028457751) 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, 68962 + ... + 82538.

It is an arithmetic number, because the mean of its divisors is an integer number (40509963).

Almost surely, 2^1028457750 is an apocalyptic number.

1028457750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1028457750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1296318816).

1028457750 is an abundant number, since it is smaller than the sum of its proper divisors (1564179882).

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

1028457750 is a wasteful number, since it uses less digits than its factorization.

1028457750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13698 (or 13688 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 39.

The square root of 1028457750 is about 32069.5767044094. The cubic root of 1028457750 is about 1009.3973302258.

The spelling of 1028457750 in words is "one billion, twenty-eight million, four hundred fifty-seven thousand, seven hundred fifty".