28328552 has 16 divisors (see below), whose sum is σ = 60704160. Its totient is φ = 12140784.

The previous prime is 28328551. The next prime is 28328591. The reversal of 28328552 is 25582382.

It is not an unprimeable number, because it can be changed into a prime (28328551) 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, 252878 + ... + 252989.

It is an arithmetic number, because the mean of its divisors is an integer number (3794010).

Almost surely, 2^28328552 is an apocalyptic number.

It is an amenable number.

28328552 is an abundant number, since it is smaller than the sum of its proper divisors (32375608).

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

28328552 is a wasteful number, since it uses less digits than its factorization.

28328552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505880 (or 505876 counting only the distinct ones).

The product of its digits is 38400, while the sum is 35.

The square root of 28328552 is about 5322.4573272127. The cubic root of 28328552 is about 304.8419928687.

The spelling of 28328552 in words is "twenty-eight million, three hundred twenty-eight thousand, five hundred fifty-two".