28239696 has 60 divisors (see below), whose sum is σ = 80238912. Its totient is φ = 9269568.

The previous prime is 28239689. The next prime is 28239697. The reversal of 28239696 is 69693282.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28239697) 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, 8185 + ... + 11111.

Almost surely, 2^28239696 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 28239696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40119456).

28239696 is an abundant number, since it is smaller than the sum of its proper divisors (51999216).

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

28239696 is a wasteful number, since it uses less digits than its factorization.

28239696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3008 (or 2999 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 28239696 is about 5314.1034991803. The cubic root of 28239696 is about 304.5229342008.

The spelling of 28239696 in words is "twenty-eight million, two hundred thirty-nine thousand, six hundred ninety-six".