28126180620 has 36 divisors (see below), whose sum is σ = 85316081760. Its totient is φ = 7500314784.

The previous prime is 28126180571. The next prime is 28126180627. The reversal of 28126180620 is 2608162182.

28126180620 is a `hidden beast` number, since 2 + 8 + 1 + 26 + 1 + 8 + 0 + 620 = 666.

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

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

It is not an unprimeable number, because it can be changed into a prime (28126180627) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 78128100 + ... + 78128459.

It is an arithmetic number, because the mean of its divisors is an integer number (2369891160).

Almost surely, 2^28126180620 is an apocalyptic number.

28126180620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28126180620 is an abundant number, since it is smaller than the sum of its proper divisors (57189901140).

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

28126180620 is a wasteful number, since it uses less digits than its factorization.

28126180620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156256574 (or 156256569 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The spelling of 28126180620 in words is "twenty-eight billion, one hundred twenty-six million, one hundred eighty thousand, six hundred twenty".