1028812099 has 8 divisors (see below), whose sum is σ = 1175984480. Its totient is φ = 881689536.

The previous prime is 1028812063. The next prime is 1028812111. The reversal of 1028812099 is 9902188201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1028812099 - 2¹⁹ = 1028287811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1028812699) 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, 59647 + ... + 74935.

It is an arithmetic number, because the mean of its divisors is an integer number (146998060).

Almost surely, 2^1028812099 is an apocalyptic number.

1028812099 is a deficient number, since it is larger than the sum of its proper divisors (147172381).

1028812099 is an equidigital number, since it uses as much as digits as its factorization.

1028812099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24909.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 1028812099 is about 32075.1009195606. The cubic root of 1028812099 is about 1009.5132441962.

The spelling of 1028812099 in words is "one billion, twenty-eight million, eight hundred twelve thousand, ninety-nine".