28240416 has 36 divisors (see below), whose sum is σ = 80309502. Its totient is φ = 9413376.

The previous prime is 28240393. The next prime is 28240423. The reversal of 28240416 is 61404282.

28240416 is a `hidden beast` number, since 2 + 8 + 240 + 416 = 666.

It can be written as a sum of positive squares in only one way, i.e., 27248400 + 992016 = 5220^2 + 996^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28240416.

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, 48741 + ... + 49316.

Almost surely, 2^28240416 is an apocalyptic number.

It is an amenable number.

28240416 is an abundant number, since it is smaller than the sum of its proper divisors (52069086).

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

28240416 is a wasteful number, since it uses less digits than its factorization.

28240416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98073 (or 98062 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 28240416 is about 5314.1712430068. The cubic root of 28240416 is about 304.5255222203.

Adding to 28240416 its reverse (61404282), we get a palindrome (89644698).

The spelling of 28240416 in words is "twenty-eight million, two hundred forty thousand, four hundred sixteen".