28689230 has 16 divisors (see below), whose sum is σ = 51745824. Its totient is φ = 11452320.

The previous prime is 28689209. The next prime is 28689247. The reversal of 28689230 is 3298682.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2759 + ... + 8061.

It is an arithmetic number, because the mean of its divisors is an integer number (3234114).

Almost surely, 2^28689230 is an apocalyptic number.

28689230 is a deficient number, since it is larger than the sum of its proper divisors (23056594).

28689230 is a wasteful number, since it uses less digits than its factorization.

28689230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5851.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 28689230 is about 5356.2328179421. The cubic root of 28689230 is about 306.1302861265.

It can be divided in two parts, 2 and 8689230, that multiplied together give a triangular number (17378460 = T₅₈₉₅).

The spelling of 28689230 in words is "twenty-eight million, six hundred eighty-nine thousand, two hundred thirty".