28099456 has 64 divisors (see below), whose sum is σ = 69816960. Its totient is φ = 10944000.

The previous prime is 28099451. The next prime is 28099493. The reversal of 28099456 is 65499082.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28099451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8431 + ... + 11281.

It is an arithmetic number, because the mean of its divisors is an integer number (1090890).

Almost surely, 2^28099456 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 28099456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34908480).

28099456 is an abundant number, since it is smaller than the sum of its proper divisors (41717504).

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

28099456 is a wasteful number, since it uses less digits than its factorization.

28099456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2883 (or 2871 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 28099456 is about 5300.8920004090. The cubic root of 28099456 is about 304.0180044738.

The spelling of 28099456 in words is "twenty-eight million, ninety-nine thousand, four hundred fifty-six".