28905772 has 12 divisors (see below), whose sum is σ = 57811600. Its totient is φ = 12388176.

The previous prime is 28905757. The next prime is 28905841. The reversal of 28905772 is 27750982.

28905772 is an admirable 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 3 ways as a sum of consecutive naturals, for example, 516147 + ... + 516202.

Almost surely, 2^28905772 is an apocalyptic number.

It is an amenable number.

28905772 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28905772 is a wasteful number, since it uses less digits than its factorization.

28905772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032360 (or 1032358 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 28905772 is about 5376.4088386208. The cubic root of 28905772 is about 306.8985648824.

The spelling of 28905772 in words is "twenty-eight million, nine hundred five thousand, seven hundred seventy-two".