28689258 has 32 divisors (see below), whose sum is σ = 63306432. Its totient is φ = 8611200.

The previous prime is 28689247. The next prime is 28689263. The reversal of 28689258 is 85298682.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1288 + ... + 7683.

It is an arithmetic number, because the mean of its divisors is an integer number (1978326).

Almost surely, 2^28689258 is an apocalyptic number.

28689258 is an abundant number, since it is smaller than the sum of its proper divisors (34617174).

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

28689258 is a wasteful number, since it uses less digits than its factorization.

28689258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9030.

The product of its digits is 552960, while the sum is 48.

The square root of 28689258 is about 5356.2354317188. The cubic root of 28689258 is about 306.1303857184.

The spelling of 28689258 in words is "twenty-eight million, six hundred eighty-nine thousand, two hundred fifty-eight".