8190728 has 32 divisors (see below), whose sum is σ = 18903360. Its totient is φ = 3240000.

The previous prime is 8190701. The next prime is 8190751. The reversal of 8190728 is 8270918.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4898 + ... + 6353.

It is an arithmetic number, because the mean of its divisors is an integer number (590730).

Almost surely, 2^8190728 is an apocalyptic number.

It is an amenable number.

8190728 is an abundant number, since it is smaller than the sum of its proper divisors (10712632).

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

8190728 is a wasteful number, since it uses less digits than its factorization.

8190728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11277 (or 11273 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 8190728 is about 2861.9447933180. The cubic root of 8190728 is about 201.5769337219.

It can be divided in two parts, 81 and 90728, that added together give a palindrome (90809).

The spelling of 8190728 in words is "eight million, one hundred ninety thousand, seven hundred twenty-eight".