28295550 has 72 divisors (see below), whose sum is σ = 76631256. Its totient is φ = 7485120.

The previous prime is 28295479. The next prime is 28295557. The reversal of 28295550 is 5559282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28295557) 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, 102012 + ... + 102288.

It is an arithmetic number, because the mean of its divisors is an integer number (1064323).

Almost surely, 2^28295550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28295550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38315628).

28295550 is an abundant number, since it is smaller than the sum of its proper divisors (48335706).

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

28295550 is a wasteful number, since it uses less digits than its factorization.

28295550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522 (or 514 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 28295550 is about 5319.3561640484. The cubic root of 28295550 is about 304.7235692999.

The spelling of 28295550 in words is "twenty-eight million, two hundred ninety-five thousand, five hundred fifty".