28424016 has 30 divisors (see below), whose sum is σ = 79548170. Its totient is φ = 9474624.

The previous prime is 28424003. The next prime is 28424023. The reversal of 28424016 is 61042482.

It can be written as a sum of positive squares in only one way, i.e., 28132416 + 291600 = 5304^2 + 540^2 .

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 5 ways as a sum of consecutive naturals, for example, 98551 + ... + 98838.

Almost surely, 2^28424016 is an apocalyptic number.

It is an amenable number.

28424016 is an abundant number, since it is smaller than the sum of its proper divisors (51124154).

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

28424016 is a wasteful number, since it uses less digits than its factorization.

28424016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197403 (or 197394 counting only the distinct ones).

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

The square root of 28424016 is about 5331.4178226809. The cubic root of 28424016 is about 305.1840365608.

Adding to 28424016 its reverse (61042482), we get a palindrome (89466498).

The spelling of 28424016 in words is "twenty-eight million, four hundred twenty-four thousand, sixteen".