28217176260 has 720 divisors, whose sum is σ = 106781290560. Its totient is φ = 5547709440.

The previous prime is 28217176231. The next prime is 28217176277. The reversal of 28217176260 is 6267171282.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 462576630 + ... + 462576690.

It is an arithmetic number, because the mean of its divisors is an integer number (148307348).

Almost surely, 2^28217176260 is an apocalyptic number.

28217176260 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 28217176260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53390645280).

28217176260 is an abundant number, since it is smaller than the sum of its proper divisors (78564114300).

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

28217176260 is a wasteful number, since it uses less digits than its factorization.

28217176260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 42.

The spelling of 28217176260 in words is "twenty-eight billion, two hundred seventeen million, one hundred seventy-six thousand, two hundred sixty".