28508270 has 32 divisors (see below), whose sum is σ = 61198848. Its totient is φ = 9348768.

The previous prime is 28508267. The next prime is 28508281. The reversal of 28508270 is 7280582.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7244 + ... + 10463.

It is an arithmetic number, because the mean of its divisors is an integer number (1912464).

Almost surely, 2^28508270 is an apocalyptic number.

28508270 is an abundant number, since it is smaller than the sum of its proper divisors (32690578).

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

28508270 is a wasteful number, since it uses less digits than its factorization.

28508270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17744.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 28508270 is about 5339.3136263007. The cubic root of 28508270 is about 305.4852796080.

The spelling of 28508270 in words is "twenty-eight million, five hundred eight thousand, two hundred seventy".