28055586420000 has 180 divisors, whose sum is σ = 99696929762430. Its totient is φ = 7481489664000.

The previous prime is 28055586419989. The next prime is 28055586420019. The reversal of 28055586420000 is 2468555082.

It is a happy number.

28055586420000 is a `hidden beast` number, since 28 + 0 + 5 + 5 + 586 + 42 + 0 + 0 + 0 + 0 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 2190672328464 + 25864914091536 = 1480092^2 + 5085756^2 .

It is a tau number, because it is divible by the number of its divisors (180).

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

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 29 ways as a sum of consecutive naturals, for example, 77752185 + ... + 78112184.

Almost surely, 2^{28055586420000} is an apocalyptic number.

28055586420000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28055586420000 is an abundant number, since it is smaller than the sum of its proper divisors (71641343342430).

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

28055586420000 is a wasteful number, since it uses less digits than its factorization.

28055586420000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155864405 (or 155864379 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 45.

The spelling of 28055586420000 in words is "twenty-eight trillion, fifty-five billion, five hundred eighty-six million, four hundred twenty thousand".