1128023280 has 80 divisors (see below), whose sum is σ = 3885420960. Its totient is φ = 300805632.

The previous prime is 1128023279. The next prime is 1128023297. The reversal of 1128023280 is 823208211.

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 258957 + ... + 263276.

It is an arithmetic number, because the mean of its divisors is an integer number (48567762).

Almost surely, 2^1128023280 is an apocalyptic number.

1128023280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1128023280 is an abundant number, since it is smaller than the sum of its proper divisors (2757397680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1128023280 is a wasteful number, since it uses less digits than its factorization.

1128023280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522255 (or 522243 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 1128023280 is about 33586.0578216617. The cubic root of 1128023280 is about 1040.9727338821.

The spelling of 1128023280 in words is "one billion, one hundred twenty-eight million, twenty-three thousand, two hundred eighty".