28561650 has 96 divisors (see below), whose sum is σ = 77578368. Its totient is φ = 6912000.

The previous prime is 28561639. The next prime is 28561657. The reversal of 28561650 is 5616582.

It is not an unprimeable number, because it can be changed into a prime (28561657) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 189075 + ... + 189225.

It is an arithmetic number, because the mean of its divisors is an integer number (808108).

Almost surely, 2^28561650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28561650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38789184).

28561650 is an abundant number, since it is smaller than the sum of its proper divisors (49016718).

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

28561650 is a wasteful number, since it uses less digits than its factorization.

28561650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 28561650 is about 5344.3100583705. The cubic root of 28561650 is about 305.6758282566.

The spelling of 28561650 in words is "twenty-eight million, five hundred sixty-one thousand, six hundred fifty".