7728842 has 8 divisors (see below), whose sum is σ = 12647232. Its totient is φ = 3513100.

The previous prime is 7728841. The next prime is 7728857. The reversal of 7728842 is 2488277.

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

It is a junction number, because it is equal to n+sod(n) for n = 7728796 and 7728805.

It is not an unprimeable number, because it can be changed into a prime (7728841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175634 + ... + 175677.

It is an arithmetic number, because the mean of its divisors is an integer number (1580904).

Almost surely, 2^7728842 is an apocalyptic number.

7728842 is a deficient number, since it is larger than the sum of its proper divisors (4918390).

7728842 is a wasteful number, since it uses less digits than its factorization.

7728842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351324.

The product of its digits is 50176, while the sum is 38.

The square root of 7728842 is about 2780.0794952663. The cubic root of 7728842 is about 197.7143280267.

The spelling of 7728842 in words is "seven million, seven hundred twenty-eight thousand, eight hundred forty-two".