1330928028 has 108 divisors (see below), whose sum is σ = 3724707168. Its totient is φ = 399294720.

The previous prime is 1330928023. The next prime is 1330928029. The reversal of 1330928028 is 8208290331.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1330927983 and 1330928001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1330928023) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 321693 + ... + 325803.

Almost surely, 2^1330928028 is an apocalyptic number.

1330928028 is a gapful number since it is divisible by the number (18) 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 1330928028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1862353584).

1330928028 is an abundant number, since it is smaller than the sum of its proper divisors (2393779140).

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

1330928028 is a wasteful number, since it uses less digits than its factorization.

1330928028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4184 (or 4156 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 1330928028 is about 36481.8862999160. The cubic root of 1330928028 is about 1099.9801726454.

The spelling of 1330928028 in words is "one billion, three hundred thirty million, nine hundred twenty-eight thousand, twenty-eight".