12528392220 has 36 divisors (see below), whose sum is σ = 38002790280. Its totient is φ = 3340904544.

The previous prime is 12528392209. The next prime is 12528392221. The reversal of 12528392220 is 2229382521.

12528392220 is a `hidden beast` number, since 1 + 25 + 28 + 392 + 220 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×12528392220² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12528392221) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 34800910 + ... + 34801269.

Almost surely, 2^12528392220 is an apocalyptic number.

12528392220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12528392220 is an abundant number, since it is smaller than the sum of its proper divisors (25474398060).

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

12528392220 is a wasteful number, since it uses less digits than its factorization.

12528392220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69602194 (or 69602189 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 12528392220 in words is "twelve billion, five hundred twenty-eight million, three hundred ninety-two thousand, two hundred twenty".