28905562 has 16 divisors (see below), whose sum is σ = 49635072. Its totient is φ = 12367440.

The previous prime is 28905557. The next prime is 28905577. The reversal of 28905562 is 26550982.

It is a happy 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, 9487 + ... + 12157.

It is an arithmetic number, because the mean of its divisors is an integer number (3102192).

Almost surely, 2^28905562 is an apocalyptic number.

28905562 is a deficient number, since it is larger than the sum of its proper divisors (20729510).

28905562 is a wasteful number, since it uses less digits than its factorization.

28905562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3453.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 28905562 is about 5376.3893088206. The cubic root of 28905562 is about 306.8978216761.

The spelling of 28905562 in words is "twenty-eight million, nine hundred five thousand, five hundred sixty-two".