28339830 has 48 divisors (see below), whose sum is σ = 77566320. Its totient is φ = 7159104.

The previous prime is 28339813. The next prime is 28339853. The reversal of 28339830 is 3893382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6577 + ... + 9996.

It is an arithmetic number, because the mean of its divisors is an integer number (1615965).

Almost surely, 2^28339830 is an apocalyptic number.

28339830 is an abundant number, since it is smaller than the sum of its proper divisors (49226490).

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

28339830 is a wasteful number, since it uses less digits than its factorization.

28339830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16605 (or 16602 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 28339830 is about 5323.5166948174. The cubic root of 28339830 is about 304.8824414810.

The spelling of 28339830 in words is "twenty-eight million, three hundred thirty-nine thousand, eight hundred thirty".