28905936 has 40 divisors (see below), whose sum is σ = 75260064. Its totient is φ = 9559680.

The previous prime is 28905911. The next prime is 28905949. The reversal of 28905936 is 63950982.

It is a congruent number.

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, 3990 + ... + 8586.

Almost surely, 2^28905936 is an apocalyptic number.

It is an amenable number.

28905936 is an abundant number, since it is smaller than the sum of its proper divisors (46354128).

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

28905936 is a wasteful number, since it uses less digits than its factorization.

28905936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4739 (or 4733 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 28905936 is about 5376.4240904155. The cubic root of 28905936 is about 306.8991452886.

The spelling of 28905936 in words is "twenty-eight million, nine hundred five thousand, nine hundred thirty-six".