1028047780 has 12 divisors (see below), whose sum is σ = 2158900380. Its totient is φ = 411219104.

The previous prime is 1028047771. The next prime is 1028047789. The reversal of 1028047780 is 877408201.

1028047780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1028047771) and next prime (1028047789).

It can be written as a sum of positive squares in 2 ways, for example, as 456933376 + 571114404 = 21376^2 + 23898^2 .

It is not an unprimeable number, because it can be changed into a prime (1028047789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25701175 + ... + 25701214.

It is an arithmetic number, because the mean of its divisors is an integer number (179908365).

Almost surely, 2^1028047780 is an apocalyptic number.

1028047780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1028047780 is an abundant number, since it is smaller than the sum of its proper divisors (1130852600).

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

1028047780 is a wasteful number, since it uses less digits than its factorization.

1028047780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51402398 (or 51402396 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 1028047780 is about 32063.1841837332. The cubic root of 1028047780 is about 1009.2631883930.

The spelling of 1028047780 in words is "one billion, twenty-eight million, forty-seven thousand, seven hundred eighty".