28767776 has 24 divisors (see below), whose sum is σ = 56756700. Its totient is φ = 14353408.

The previous prime is 28767769. The next prime is 28767787. The reversal of 28767776 is 67776782.

It can be written as a sum of positive squares in 2 ways, for example, as 22316176 + 6451600 = 4724^2 + 2540^2 .

It is a super-3 number, since 3×28767776³ (a number of 23 digits) contains 333 as substring.

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 3 ways as a sum of consecutive naturals, for example, 26900 + ... + 27948.

Almost surely, 2^28767776 is an apocalyptic number.

It is an amenable number.

28767776 is a deficient number, since it is larger than the sum of its proper divisors (27988924).

28767776 is a wasteful number, since it uses less digits than its factorization.

28767776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1916 (or 1908 counting only the distinct ones).

The product of its digits is 1382976, while the sum is 50.

The square root of 28767776 is about 5363.5600117832. The cubic root of 28767776 is about 306.4094082784.

The spelling of 28767776 in words is "twenty-eight million, seven hundred sixty-seven thousand, seven hundred seventy-six".