1128245823 has 24 divisors (see below), whose sum is σ = 1642492800. Its totient is φ = 746277840.

The previous prime is 1128245801. The next prime is 1128245843. The reversal of 1128245823 is 3285428211.

It is a happy number.

It is not a de Polignac number, because 1128245823 - 2⁶ = 1128245759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128245843) 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 23 ways as a sum of consecutive naturals, for example, 878740 + ... + 880022.

It is an arithmetic number, because the mean of its divisors is an integer number (68437200).

Almost surely, 2^1128245823 is an apocalyptic number.

1128245823 is a deficient number, since it is larger than the sum of its proper divisors (514246977).

1128245823 is a wasteful number, since it uses less digits than its factorization.

1128245823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979 (or 1976 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 1128245823 is about 33589.3706847866. The cubic root of 1128245823 is about 1041.0411857679.

The spelling of 1128245823 in words is "one billion, one hundred twenty-eight million, two hundred forty-five thousand, eight hundred twenty-three".