28681224276160 has 112 divisors (see below), whose sum is σ = 70174794652416. Its totient is φ = 11157368205312.

The previous prime is 28681224276139. The next prime is 28681224276163. The reversal of 28681224276160 is 6167242218682.

It is a happy number.

It is a super-2 number, since 2×28681224276160² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28681224276163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25654609 + ... + 26749231.

Almost surely, 2^{28681224276160} is an apocalyptic number.

28681224276160 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 28681224276160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35087397326208).

28681224276160 is an abundant number, since it is smaller than the sum of its proper divisors (41493570376256).

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

28681224276160 is a wasteful number, since it uses less digits than its factorization.

28681224276160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096890 (or 1096880 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 55.

The spelling of 28681224276160 in words is "twenty-eight trillion, six hundred eighty-one billion, two hundred twenty-four million, two hundred seventy-six thousand, one hundred sixty".