28875330 has 48 divisors (see below), whose sum is σ = 81903744. Its totient is φ = 6999840.

The previous prime is 28875313. The next prime is 28875331. The reversal of 28875330 is 3357882.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28875331) 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 23 ways as a sum of consecutive naturals, for example, 13594 + ... + 15573.

It is an arithmetic number, because the mean of its divisors is an integer number (1706328).

Almost surely, 2^28875330 is an apocalyptic number.

28875330 is an abundant number, since it is smaller than the sum of its proper divisors (53028414).

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

28875330 is a wasteful number, since it uses less digits than its factorization.

28875330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29191 (or 29188 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 28875330 is about 5373.5770209424. The cubic root of 28875330 is about 306.7907907010.

The spelling of 28875330 in words is "twenty-eight million, eight hundred seventy-five thousand, three hundred thirty".