28364005620 has 54 divisors (see below), whose sum is σ = 86044338198. Its totient is φ = 7563132288.

The previous prime is 28364005603. The next prime is 28364005721. The reversal of 28364005620 is 2650046382.

28364005620 is a `hidden beast` number, since 2 + 8 + 3 + 640 + 0 + 5 + 6 + 2 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 21429446544 + 6934559076 = 146388^2 + 83274^2 .

It is a super-2 number, since 2×28364005620² (a number of 22 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 an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2253264 + ... + 2265816.

Almost surely, 2^28364005620 is an apocalyptic number.

28364005620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28364005620 is an abundant number, since it is smaller than the sum of its proper divisors (57680332578).

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

28364005620 is an equidigital number, since it uses as much as digits as its factorization.

28364005620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25121 (or 12563 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 28364005620 in words is "twenty-eight billion, three hundred sixty-four million, five thousand, six hundred twenty".