28616730 has 48 divisors (see below), whose sum is σ = 70022880. Its totient is φ = 7484544.

The previous prime is 28616719. The next prime is 28616737. The reversal of 28616730 is 3761682.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28616691 and 28616700.

It is not an unprimeable number, because it can be changed into a prime (28616737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159781 + ... + 159959.

It is an arithmetic number, because the mean of its divisors is an integer number (1458810).

Almost surely, 2^28616730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28616730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35011440).

28616730 is an abundant number, since it is smaller than the sum of its proper divisors (41406150).

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

28616730 is a wasteful number, since it uses less digits than its factorization.

28616730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335 (or 262 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 28616730 is about 5349.4607204839. The cubic root of 28616730 is about 305.8721966186.

It can be divided in two parts, 2861 and 6730, that added together give a triangular number (9591 = T₁₃₈).

The spelling of 28616730 in words is "twenty-eight million, six hundred sixteen thousand, seven hundred thirty".