28299450 has 48 divisors (see below), whose sum is σ = 72093600. Its totient is φ = 7341120.

The previous prime is 28299443. The next prime is 28299451. The reversal of 28299450 is 5499282.

It is a junction number, because it is equal to n+sod(n) for n = 28299399 and 28299408.

It is not an unprimeable number, because it can be changed into a prime (28299451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3001 + ... + 8099.

It is an arithmetic number, because the mean of its divisors is an integer number (1501950).

Almost surely, 2^28299450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28299450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36046800).

28299450 is an abundant number, since it is smaller than the sum of its proper divisors (43794150).

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

28299450 is a wasteful number, since it uses less digits than its factorization.

28299450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5151 (or 5146 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 28299450 is about 5319.7227371358. The cubic root of 28299450 is about 304.7375687607.

The spelling of 28299450 in words is "twenty-eight million, two hundred ninety-nine thousand, four hundred fifty".