89390728 has 32 divisors (see below), whose sum is σ = 193075200. Its totient is φ = 38005632.

The previous prime is 89390677. The next prime is 89390753. The reversal of 89390728 is 82709398.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

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, 828 + ... + 13396.

It is an arithmetic number, because the mean of its divisors is an integer number (6033600).

Almost surely, 2^89390728 is an apocalyptic number.

It is an amenable number.

89390728 is an abundant number, since it is smaller than the sum of its proper divisors (103684472).

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

89390728 is a wasteful number, since it uses less digits than its factorization.

89390728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12709 (or 12705 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 89390728 is about 9454.6669957223. Note that the first 3 decimals coincide. The cubic root of 89390728 is about 447.1269268716.

The spelling of 89390728 in words is "eighty-nine million, three hundred ninety thousand, seven hundred twenty-eight".