28689764 has 24 divisors (see below), whose sum is σ = 51330048. Its totient is φ = 14027040.

The previous prime is 28689743. The next prime is 28689769. The reversal of 28689764 is 46798682.

It is not an unprimeable number, because it can be changed into a prime (28689769) 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 7 ways as a sum of consecutive naturals, for example, 74717 + ... + 75099.

It is an arithmetic number, because the mean of its divisors is an integer number (2138752).

Almost surely, 2^28689764 is an apocalyptic number.

It is an amenable number.

28689764 is a deficient number, since it is larger than the sum of its proper divisors (22640284).

28689764 is a wasteful number, since it uses less digits than its factorization.

28689764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755 (or 753 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 50.

The square root of 28689764 is about 5356.2826661781. The cubic root of 28689764 is about 306.1321854752.

The spelling of 28689764 in words is "twenty-eight million, six hundred eighty-nine thousand, seven hundred sixty-four".