28269648 has 120 divisors (see below), whose sum is σ = 89640096. Its totient is φ = 8553600.

The previous prime is 28269629. The next prime is 28269653. The reversal of 28269648 is 84696282.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42438 + ... + 43098.

Almost surely, 2^28269648 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 28269648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44820048).

28269648 is an abundant number, since it is smaller than the sum of its proper divisors (61370448).

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

28269648 is a wasteful number, since it uses less digits than its factorization.

28269648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695 (or 677 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 28269648 is about 5316.9209134611. The cubic root of 28269648 is about 304.6305586847.

The spelling of 28269648 in words is "twenty-eight million, two hundred sixty-nine thousand, six hundred forty-eight".