190728 has 32 divisors (see below), whose sum is σ = 530400. Its totient is φ = 63504.

The previous prime is 190717. The next prime is 190753. The reversal of 190728 is 827091.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

190728 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226 + ... + 657.

It is an arithmetic number, because the mean of its divisors is an integer number (16575).

2¹⁹⁰⁷²⁸ is an apocalyptic number.

190728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

190728 is an abundant number, since it is smaller than the sum of its proper divisors (339672).

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

190728 is a wasteful number, since it uses less digits than its factorization.

190728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898 (or 888 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 190728 is about 436.7241692419. The cubic root of 190728 is about 57.5623017214.

The spelling of 190728 in words is "one hundred ninety thousand, seven hundred twenty-eight".