7728238 has 16 divisors (see below), whose sum is σ = 13676544. Its totient is φ = 3205080.

The previous prime is 7728221. The next prime is 7728271. The reversal of 7728238 is 8328277.

It is a junction number, because it is equal to n+sod(n) for n = 7728197 and 7728206.

It is a congruent number.

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, 8470 + ... + 9337.

It is an arithmetic number, because the mean of its divisors is an integer number (854784).

Almost surely, 2^7728238 is an apocalyptic number.

7728238 is a deficient number, since it is larger than the sum of its proper divisors (5948306).

7728238 is a wasteful number, since it uses less digits than its factorization.

7728238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17847.

The product of its digits is 37632, while the sum is 37.

The square root of 7728238 is about 2779.9708631567. The cubic root of 7728238 is about 197.7091775111.

The spelling of 7728238 in words is "seven million, seven hundred twenty-eight thousand, two hundred thirty-eight".