842728 has 8 divisors (see below), whose sum is σ = 1580130. Its totient is φ = 421360.

The previous prime is 842701. The next prime is 842729. The reversal of 842728 is 827248.

It can be written as a sum of positive squares in only one way, i.e., 842724 + 4 = 918^2 + 2^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 842728.

It is not an unprimeable number, because it can be changed into a prime (842729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52663 + ... + 52678.

2⁸⁴²⁷²⁸ is an apocalyptic number.

It is an amenable number.

842728 is a deficient number, since it is larger than the sum of its proper divisors (737402).

842728 is a wasteful number, since it uses less digits than its factorization.

842728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105347 (or 105343 counting only the distinct ones).

The product of its digits is 7168, while the sum is 31.

The square root of 842728 is about 918.0021786467. The cubic root of 842728 is about 94.4559110517.

The spelling of 842728 in words is "eight hundred forty-two thousand, seven hundred twenty-eight".