1028946780 has 96 divisors (see below), whose sum is σ = 3253750080. Its totient is φ = 269879040.

The previous prime is 1028946739. The next prime is 1028946781. The reversal of 1028946780 is 876498201.

1028946780 is a `hidden beast` number, since 102 + 8 + 9 + 467 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028946781) 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, 17322 + ... + 48558.

It is an arithmetic number, because the mean of its divisors is an integer number (33893230).

Almost surely, 2^1028946780 is an apocalyptic number.

1028946780 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 1028946780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1626875040).

1028946780 is an abundant number, since it is smaller than the sum of its proper divisors (2224803300).

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

1028946780 is a wasteful number, since it uses less digits than its factorization.

1028946780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31316 (or 31308 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 1028946780 is about 32077.2003142419. The cubic root of 1028946780 is about 1009.5572938081.

The spelling of 1028946780 in words is "one billion, twenty-eight million, nine hundred forty-six thousand, seven hundred eighty".