28061568 has 48 divisors (see below), whose sum is σ = 80753400. Its totient is φ = 9353472.

The previous prime is 28061557. The next prime is 28061569. The reversal of 28061568 is 86516082.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28061569) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 11028 + ... + 13331.

Almost surely, 2^28061568 is an apocalyptic number.

It is an amenable number.

28061568 is an abundant number, since it is smaller than the sum of its proper divisors (52691832).

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

28061568 is a wasteful number, since it uses less digits than its factorization.

28061568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24379 (or 24364 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 28061568 is about 5297.3170567751. The cubic root of 28061568 is about 303.8813017669.

The spelling of 28061568 in words is "twenty-eight million, sixty-one thousand, five hundred sixty-eight".