28247716 has 36 divisors (see below), whose sum is σ = 57915648. Its totient is φ = 12019728.

The previous prime is 28247707. The next prime is 28247717. The reversal of 28247716 is 61774282.

It is not an unprimeable number, because it can be changed into a prime (28247717) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32301 + ... + 33163.

It is an arithmetic number, because the mean of its divisors is an integer number (1608768).

Almost surely, 2^28247716 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28247716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28957824).

28247716 is an abundant number, since it is smaller than the sum of its proper divisors (29667932).

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

28247716 is a wasteful number, since it uses less digits than its factorization.

28247716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048 (or 1039 counting only the distinct ones).

The product of its digits is 37632, while the sum is 37.

The square root of 28247716 is about 5314.8580413780. The cubic root of 28247716 is about 304.5517593786.

The spelling of 28247716 in words is "twenty-eight million, two hundred forty-seven thousand, seven hundred sixteen".