28785536 has 32 divisors (see below), whose sum is σ = 61761000. Its totient is φ = 13284864.

The previous prime is 28785521. The next prime is 28785541. The reversal of 28785536 is 63558782.

It is a tau number, because it is divible by the number of its divisors (32).

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, 6986 + ... + 10313.

Almost surely, 2^28785536 is an apocalyptic number.

28785536 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

28785536 is an abundant number, since it is smaller than the sum of its proper divisors (32975464).

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

28785536 is a wasteful number, since it uses less digits than its factorization.

28785536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17326 (or 17314 counting only the distinct ones).

The product of its digits is 403200, while the sum is 44.

The square root of 28785536 is about 5365.2153731234. The cubic root of 28785536 is about 306.4724500145.

The spelling of 28785536 in words is "twenty-eight million, seven hundred eighty-five thousand, five hundred thirty-six".