28776516 has 24 divisors (see below), whose sum is σ = 67812864. Its totient is φ = 9496800.

The previous prime is 28776499. The next prime is 28776521. The reversal of 28776516 is 61567782.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10660 + ... + 13083.

It is an arithmetic number, because the mean of its divisors is an integer number (2825536).

Almost surely, 2^28776516 is an apocalyptic number.

It is an amenable number.

28776516 is an abundant number, since it is smaller than the sum of its proper divisors (39036348).

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

28776516 is a wasteful number, since it uses less digits than its factorization.

28776516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23851 (or 23849 counting only the distinct ones).

The product of its digits is 141120, while the sum is 42.

The square root of 28776516 is about 5364.3747072702. The cubic root of 28776516 is about 306.4404354373.

It can be divided in two parts, 28776 and 516, that added together give a palindrome (29292).

The spelling of 28776516 in words is "twenty-eight million, seven hundred seventy-six thousand, five hundred sixteen".