342728 has 8 divisors (see below), whose sum is σ = 642630. Its totient is φ = 171360.

The previous prime is 342697. The next prime is 342733. The reversal of 342728 is 827243.

It can be written as a sum of positive squares in only one way, i.e., 228484 + 114244 = 478^2 + 338^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 342697 and 342706.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 342728.

It is an unprimeable number.

342728 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21413 + ... + 21428.

2³⁴²⁷²⁸ is an apocalyptic number.

It is an amenable number.

342728 is a deficient number, since it is larger than the sum of its proper divisors (299902).

342728 is a wasteful number, since it uses less digits than its factorization.

342728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42847 (or 42843 counting only the distinct ones).

The product of its digits is 2688, while the sum is 26.

The square root of 342728 is about 585.4297566745. The cubic root of 342728 is about 69.9814917054.

The spelling of 342728 in words is "three hundred forty-two thousand, seven hundred twenty-eight".