1028677864 has 24 divisors (see below), whose sum is σ = 1976987430. Its totient is φ = 501787520.

The previous prime is 1028677817. The next prime is 1028677883. The reversal of 1028677864 is 4687768201.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 155002500 + 873675364 = 12450^2 + 29558^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24799 + ... + 51694.

Almost surely, 2^1028677864 is an apocalyptic number.

It is an amenable number.

1028677864 is a deficient number, since it is larger than the sum of its proper divisors (948309566).

1028677864 is an equidigital number, since it uses as much as digits as its factorization.

1028677864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76581 (or 76536 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 49.

The square root of 1028677864 is about 32073.0083403475. The cubic root of 1028677864 is about 1009.4693366306.

The spelling of 1028677864 in words is "one billion, twenty-eight million, six hundred seventy-seven thousand, eight hundred sixty-four".