28516937 has 6 divisors (see below), whose sum is σ = 28929354. Its totient is φ = 28110320.

The previous prime is 28516919. The next prime is 28516949. The reversal of 28516937 is 73961582.

It can be written as a sum of positive squares in only one way, i.e., 18757561 + 9759376 = 4331^2 + 3124^2 .

It is not a de Polignac number, because 28516937 - 2⁸ = 28516681 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28516894 and 28516903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28516337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2213 + ... + 7869.

It is an arithmetic number, because the mean of its divisors is an integer number (4821559).

Almost surely, 2^28516937 is an apocalyptic number.

It is an amenable number.

28516937 is a deficient number, since it is larger than the sum of its proper divisors (412417).

28516937 is an frugal number, since it uses more digits than its factorization.

28516937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5799 (or 5728 counting only the distinct ones).

The product of its digits is 90720, while the sum is 41.

The square root of 28516937 is about 5340.1251857986. The cubic root of 28516937 is about 305.5162340487.

The spelling of 28516937 in words is "twenty-eight million, five hundred sixteen thousand, nine hundred thirty-seven".