28616094720 has 220 divisors, whose sum is σ = 102545390244. Its totient is φ = 7630848000.

The previous prime is 28616094719. The next prime is 28616094733. The reversal of 28616094720 is 2749061682.

It is a happy number.

28616094720 is a `hidden beast` number, since 2 + 8 + 616 + 0 + 9 + 4 + 7 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3798503424 + 24817591296 = 61632^2 + 157536^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 380220 + ... + 449220.

Almost surely, 2^28616094720 is an apocalyptic number.

28616094720 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 28616094720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51272695122).

28616094720 is an abundant number, since it is smaller than the sum of its proper divisors (73929295524).

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

28616094720 is an equidigital number, since it uses as much as digits as its factorization.

28616094720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69038 (or 69011 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 28616094720 in words is "twenty-eight billion, six hundred sixteen million, ninety-four thousand, seven hundred twenty".