28597727700 has 144 divisors (see below), whose sum is σ = 92072232000. Its totient is φ = 7614794880.

The previous prime is 28597727657. The next prime is 28597727701. The reversal of 28597727700 is 772779582.

28597727700 is a `hidden beast` number, since 28 + 597 + 7 + 27 + 7 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28597727701) 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 47 ways as a sum of consecutive naturals, for example, 1906831 + ... + 1921769.

It is an arithmetic number, because the mean of its divisors is an integer number (639390500).

Almost surely, 2^28597727700 is an apocalyptic number.

28597727700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28597727700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46036116000).

28597727700 is an abundant number, since it is smaller than the sum of its proper divisors (63474504300).

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

28597727700 is a wasteful number, since it uses less digits than its factorization.

28597727700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15671 (or 15658 counting only the distinct ones).

The product of its (nonzero) digits is 3457440, while the sum is 54.

The spelling of 28597727700 in words is "twenty-eight billion, five hundred ninety-seven million, seven hundred twenty-seven thousand, seven hundred".