28777516 has 12 divisors (see below), whose sum is σ = 51311232. Its totient is φ = 14117168.

The previous prime is 28777513. The next prime is 28777519. The reversal of 28777516 is 61577782.

It is an interprime number because it is at equal distance from previous prime (28777513) and next prime (28777519).

It is not an unprimeable number, because it can be changed into a prime (28777513) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 67660 + ... + 68083.

It is an arithmetic number, because the mean of its divisors is an integer number (4275936).

Almost surely, 2^28777516 is an apocalyptic number.

It is an amenable number.

28777516 is a deficient number, since it is larger than the sum of its proper divisors (22533716).

28777516 is a wasteful number, since it uses less digits than its factorization.

28777516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135800 (or 135798 counting only the distinct ones).

The product of its digits is 164640, while the sum is 43.

The square root of 28777516 is about 5364.4679139687. The cubic root of 28777516 is about 306.4439850549.

The spelling of 28777516 in words is "twenty-eight million, seven hundred seventy-seven thousand, five hundred sixteen".