12028979520 has 140 divisors (see below), whose sum is σ = 42789288564. Its totient is φ = 3207720960.

The previous prime is 12028979503. The next prime is 12028979551. The reversal of 12028979520 is 2597982021.

It is a happy number.

12028979520 is a `hidden beast` number, since 12 + 0 + 28 + 97 + 9 + 520 = 666.

12028979520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9018921024 + 3010058496 = 94968^2 + 54864^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 206121 + ... + 257960.

Almost surely, 2^12028979520 is an apocalyptic number.

12028979520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12028979520 is an abundant number, since it is smaller than the sum of its proper divisors (30760309044).

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

12028979520 is an equidigital number, since it uses as much as digits as its factorization.

12028979520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464110 (or 464091 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

It can be divided in two parts, 120289 and 79520, that added together give a square (199809 = 447²).

The spelling of 12028979520 in words is "twelve billion, twenty-eight million, nine hundred seventy-nine thousand, five hundred twenty".