28643552 has 24 divisors (see below), whose sum is σ = 64448496. Its totient is φ = 12275712.

The previous prime is 28643519. The next prime is 28643557. The reversal of 28643552 is 25534682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28643557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63713 + ... + 64160.

It is an arithmetic number, because the mean of its divisors is an integer number (2685354).

Almost surely, 2^28643552 is an apocalyptic number.

It is an amenable number.

28643552 is an abundant number, since it is smaller than the sum of its proper divisors (35804944).

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

28643552 is a wasteful number, since it uses less digits than its factorization.

28643552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127890 (or 127882 counting only the distinct ones).

The product of its digits is 57600, while the sum is 35.

The square root of 28643552 is about 5351.9671149961. The cubic root of 28643552 is about 305.9677298050.

The spelling of 28643552 in words is "twenty-eight million, six hundred forty-three thousand, five hundred fifty-two".