1128917823 has 16 divisors (see below), whose sum is σ = 1644160896. Its totient is φ = 683318240.

The previous prime is 1128917807. The next prime is 1128917833. The reversal of 1128917823 is 3287198211.

It is not a de Polignac number, because 1128917823 - 2⁴ = 1128917807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128917833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4840 + ... + 47762.

It is an arithmetic number, because the mean of its divisors is an integer number (102760056).

Almost surely, 2^1128917823 is an apocalyptic number.

1128917823 is a deficient number, since it is larger than the sum of its proper divisors (515243073).

1128917823 is a wasteful number, since it uses less digits than its factorization.

1128917823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43734.

The product of its digits is 48384, while the sum is 42.

The square root of 1128917823 is about 33599.3723602093. The cubic root of 1128917823 is about 1041.2478312865.

The spelling of 1128917823 in words is "one billion, one hundred twenty-eight million, nine hundred seventeen thousand, eight hundred twenty-three".