1028264644 has 24 divisors (see below), whose sum is σ = 1978518528. Its totient is φ = 463710240.

The previous prime is 1028264639. The next prime is 1028264647. The reversal of 1028264644 is 4464628201.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1028264647) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 86419 + ... + 97594.

It is an arithmetic number, because the mean of its divisors is an integer number (82438272).

Almost surely, 2^1028264644 is an apocalyptic number.

It is an amenable number.

1028264644 is a deficient number, since it is larger than the sum of its proper divisors (950253884).

1028264644 is a wasteful number, since it uses less digits than its factorization.

1028264644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184155 (or 184153 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 37.

The square root of 1028264644 is about 32066.5658279773. The cubic root of 1028264644 is about 1009.3341505500.

The spelling of 1028264644 in words is "one billion, twenty-eight million, two hundred sixty-four thousand, six hundred forty-four".