1028591223 has 16 divisors (see below), whose sum is σ = 1502105472. Its totient is φ = 620900000.

The previous prime is 1028591209. The next prime is 1028591233. The reversal of 1028591223 is 3221958201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1028591223 - 2¹⁷ = 1028460151 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028591233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53808 + ... + 70373.

It is an arithmetic number, because the mean of its divisors is an integer number (93881592).

Almost surely, 2^1028591223 is an apocalyptic number.

1028591223 is a deficient number, since it is larger than the sum of its proper divisors (473514249).

1028591223 is a wasteful number, since it uses less digits than its factorization.

1028591223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124446.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 1028591223 is about 32071.6576278807. The cubic root of 1028591223 is about 1009.4409947847.

The spelling of 1028591223 in words is "one billion, twenty-eight million, five hundred ninety-one thousand, two hundred twenty-three".