28616844222720 has 432 divisors, whose sum is σ = 110576738231232. Its totient is φ = 7044145274880.

The previous prime is 28616844222691. The next prime is 28616844222773. The reversal of 28616844222720 is 2722244861682.

It is a happy number.

28616844222720 is a `hidden beast` number, since 286 + 1 + 6 + 84 + 42 + 227 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (432).

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 504915 + ... + 7582125.

Almost surely, 2^{28616844222720} is an apocalyptic number.

28616844222720 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 28616844222720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55288369115616).

28616844222720 is an abundant number, since it is smaller than the sum of its proper divisors (81959894008512).

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

28616844222720 is an equidigital number, since it uses as much as digits as its factorization.

28616844222720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7077260 (or 7077234 counting only the distinct ones).

The product of its (nonzero) digits is 8257536, while the sum is 54.

The spelling of 28616844222720 in words is "twenty-eight trillion, six hundred sixteen billion, eight hundred forty-four million, two hundred twenty-two thousand, seven hundred twenty".