28065924 has 18 divisors (see below), whose sum is σ = 70944510. Its totient is φ = 9355296.

The previous prime is 28065913. The next prime is 28065931. The reversal of 28065924 is 42956082.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 22867524 + 5198400 = 4782^2 + 2280^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 779609 = 28065924 / (2 + 8 + 0 + 6 + 5 + 9 + 2 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 389769 + ... + 389840.

Almost surely, 2^28065924 is an apocalyptic number.

It is an amenable number.

28065924 is an abundant number, since it is smaller than the sum of its proper divisors (42878586).

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

28065924 is a wasteful number, since it uses less digits than its factorization.

28065924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779619 (or 779614 counting only the distinct ones).

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

The square root of 28065924 is about 5297.7281923481. The cubic root of 28065924 is about 303.8970247949.

The spelling of 28065924 in words is "twenty-eight million, sixty-five thousand, nine hundred twenty-four".