28328550 has 24 divisors (see below), whose sum is σ = 70255176. Its totient is φ = 7554240.

The previous prime is 28328543. The next prime is 28328551. The reversal of 28328550 is 5582382.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 94279 + ... + 94578.

It is an arithmetic number, because the mean of its divisors is an integer number (2927299).

Almost surely, 2^28328550 is an apocalyptic number.

28328550 is an abundant number, since it is smaller than the sum of its proper divisors (41926626).

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

28328550 is a wasteful number, since it uses less digits than its factorization.

28328550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188872 (or 188867 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 28328550 is about 5322.4571393295. The cubic root of 28328550 is about 304.8419856947.

The spelling of 28328550 in words is "twenty-eight million, three hundred twenty-eight thousand, five hundred fifty".