1028463778 has 4 divisors (see below), whose sum is σ = 1542695670. Its totient is φ = 514231888.

The previous prime is 1028463769. The next prime is 1028463827. The reversal of 1028463778 is 8773648201.

1028463778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8773648201 = 17 ⋅516096953.

It can be written as a sum of positive squares in only one way, i.e., 928603729 + 99860049 = 30473^2 + 9993^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257115943 + ... + 257115946.

Almost surely, 2^1028463778 is an apocalyptic number.

1028463778 is a deficient number, since it is larger than the sum of its proper divisors (514231892).

1028463778 is an equidigital number, since it uses as much as digits as its factorization.

1028463778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514231891.

The product of its (nonzero) digits is 451584, while the sum is 46.

The square root of 1028463778 is about 32069.6706874268. The cubic root of 1028463778 is about 1009.3993023163.

The spelling of 1028463778 in words is "one billion, twenty-eight million, four hundred sixty-three thousand, seven hundred seventy-eight".