28205496 has 96 divisors (see below), whose sum is σ = 86486400. Its totient is φ = 8540640.

The previous prime is 28205477. The next prime is 28205501. The reversal of 28205496 is 69450282.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28205496.

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, 20725 + ... + 22043.

It is an arithmetic number, because the mean of its divisors is an integer number (900900).

Almost surely, 2^28205496 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 28205496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43243200).

28205496 is an abundant number, since it is smaller than the sum of its proper divisors (58280904).

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

28205496 is a wasteful number, since it uses less digits than its factorization.

28205496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351 (or 1335 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 28205496 is about 5310.8846720674. The cubic root of 28205496 is about 304.3999525718.

The spelling of 28205496 in words is "twenty-eight million, two hundred five thousand, four hundred ninety-six".