7728198 has 8 divisors (see below), whose sum is σ = 15456408. Its totient is φ = 2576064.

The previous prime is 7728197. The next prime is 7728199. The reversal of 7728198 is 8918277.

It is an interprime number because it is at equal distance from previous prime (7728197) and next prime (7728199).

It is a sphenic number, since it is the product of 3 distinct primes.

7728198 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7728191) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 644011 + ... + 644022.

It is an arithmetic number, because the mean of its divisors is an integer number (1932051).

Almost surely, 2^7728198 is an apocalyptic number.

7728198 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

7728198 is a wasteful number, since it uses less digits than its factorization.

7728198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288038.

The product of its digits is 56448, while the sum is 42.

The square root of 7728198 is about 2779.9636688273. The cubic root of 7728198 is about 197.7088364078.

The spelling of 7728198 in words is "seven million, seven hundred twenty-eight thousand, one hundred ninety-eight".