1028722208 has 12 divisors (see below), whose sum is σ = 2025296910. Its totient is φ = 514361088.

The previous prime is 1028722147. The next prime is 1028722213. The reversal of 1028722208 is 8022278201.

It can be written as a sum of positive squares in only one way, i.e., 642521104 + 386201104 = 25348^2 + 19652^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 32147569 = 1028722208 / (1 + 0 + 2 + 8 + 7 + 2 + 2 + 2 + 0 + 8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16073753 + ... + 16073816.

Almost surely, 2^1028722208 is an apocalyptic number.

It is an amenable number.

1028722208 is a deficient number, since it is larger than the sum of its proper divisors (996574702).

1028722208 is an equidigital number, since it uses as much as digits as its factorization.

1028722208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32147579 (or 32147571 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 1028722208 is about 32073.6996306943. The cubic root of 1028722208 is about 1009.4838417433.

The spelling of 1028722208 in words is "one billion, twenty-eight million, seven hundred twenty-two thousand, two hundred eight".