28644616 has 128 divisors (see below), whose sum is σ = 74592000. Its totient is φ = 10160640.

The previous prime is 28644613. The next prime is 28644617. The reversal of 28644616 is 61644682.

It is not an unprimeable number, because it can be changed into a prime (28644611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 392356 + ... + 392428.

It is an arithmetic number, because the mean of its divisors is an integer number (582750).

Almost surely, 2^28644616 is an apocalyptic number.

28644616 is a gapful number since it is divisible by the number (26) 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 28644616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37296000).

28644616 is an abundant number, since it is smaller than the sum of its proper divisors (45947384).

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

28644616 is a wasteful number, since it uses less digits than its factorization.

28644616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 106 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The square root of 28644616 is about 5352.0665167765. The cubic root of 28644616 is about 305.9715182741.

The spelling of 28644616 in words is "twenty-eight million, six hundred forty-four thousand, six hundred sixteen".