1028723628 has 24 divisors (see below), whose sum is σ = 2436183232. Its totient is φ = 337789584.

The previous prime is 1028723627. The next prime is 1028723629. The reversal of 1028723628 is 8263278201.

1028723628 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 (1028723627) and next prime (1028723629).

It is not an unprimeable number, because it can be changed into a prime (1028723627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 638950 + ... + 640557.

Almost surely, 2^1028723628 is an apocalyptic number.

It is an amenable number.

1028723628 is an abundant number, since it is smaller than the sum of its proper divisors (1407459604).

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

1028723628 is a wasteful number, since it uses less digits than its factorization.

1028723628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279581 (or 1279579 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 1028723628 is about 32073.7217672038. The cubic root of 1028723628 is about 1009.4843062245.

The spelling of 1028723628 in words is "one billion, twenty-eight million, seven hundred twenty-three thousand, six hundred twenty-eight".