28253214 has 48 divisors (see below), whose sum is σ = 68949504. Its totient is φ = 8283600.

The previous prime is 28253207. The next prime is 28253233. The reversal of 28253214 is 41235282.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3837 + ... + 8439.

It is an arithmetic number, because the mean of its divisors is an integer number (1436448).

Almost surely, 2^28253214 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28253214, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34474752).

28253214 is an abundant number, since it is smaller than the sum of its proper divisors (40696290).

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

28253214 is a wasteful number, since it uses less digits than its factorization.

28253214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4653 (or 4650 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 28253214 is about 5315.3752454554. The cubic root of 28253214 is about 304.5715169282.

Adding to 28253214 its reverse (41235282), we get a palindrome (69488496).

The spelling of 28253214 in words is "twenty-eight million, two hundred fifty-three thousand, two hundred fourteen".