28916550 has 72 divisors (see below), whose sum is σ = 83682144. Its totient is φ = 7116480.

The previous prime is 28916539. The next prime is 28916557. The reversal of 28916550 is 5561982.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28916557) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3379 + ... + 8321.

It is an arithmetic number, because the mean of its divisors is an integer number (1162252).

Almost surely, 2^28916550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28916550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41841072).

28916550 is an abundant number, since it is smaller than the sum of its proper divisors (54765594).

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

28916550 is a wasteful number, since it uses less digits than its factorization.

28916550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4974 (or 4966 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 28916550 is about 5377.4110871311. The cubic root of 28916550 is about 306.9367042282.

The spelling of 28916550 in words is "twenty-eight million, nine hundred sixteen thousand, five hundred fifty".