1028508123 has 4 divisors (see below), whose sum is σ = 1371344168. Its totient is φ = 685672080.

The previous prime is 1028508101. The next prime is 1028508137. The reversal of 1028508123 is 3218058201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3218058201 = 3 ⋅1072686067.

It is not a de Polignac number, because 1028508123 - 2¹⁶ = 1028442587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1028508163) 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 3 ways as a sum of consecutive naturals, for example, 171418018 + ... + 171418023.

It is an arithmetic number, because the mean of its divisors is an integer number (342836042).

Almost surely, 2^1028508123 is an apocalyptic number.

1028508123 is a deficient number, since it is larger than the sum of its proper divisors (342836045).

1028508123 is an equidigital number, since it uses as much as digits as its factorization.

1028508123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342836044.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 1028508123 is about 32070.3620653088. The cubic root of 1028508123 is about 1009.4138097689.

The spelling of 1028508123 in words is "one billion, twenty-eight million, five hundred eight thousand, one hundred twenty-three".