28520416 has 24 divisors (see below), whose sum is σ = 56944944. Its totient is φ = 14058240.

The previous prime is 28520389. The next prime is 28520417. The reversal of 28520416 is 61402582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28520417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4005 + ... + 8548.

It is an arithmetic number, because the mean of its divisors is an integer number (2372706).

Almost surely, 2^28520416 is an apocalyptic number.

It is an amenable number.

28520416 is a deficient number, since it is larger than the sum of its proper divisors (28424528).

28520416 is a wasteful number, since it uses less digits than its factorization.

28520416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12634 (or 12626 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 28520416 is about 5340.4509172915. The cubic root of 28520416 is about 305.5286576335.

Adding to 28520416 its reverse (61402582), we get a palindrome (89922998).

The spelling of 28520416 in words is "twenty-eight million, five hundred twenty thousand, four hundred sixteen".