392728 has 16 divisors (see below), whose sum is σ = 841680. Its totient is φ = 168288.

The previous prime is 392723. The next prime is 392737. The reversal of 392728 is 827293.

It is a self number, because there is not a number n which added to its sum of digits gives 392728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (392723) by changing a digit.

392728 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3451 + ... + 3562.

It is an arithmetic number, because the mean of its divisors is an integer number (52605).

2³⁹²⁷²⁸ is an apocalyptic number.

It is an amenable number.

392728 is an abundant number, since it is smaller than the sum of its proper divisors (448952).

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

392728 is a wasteful number, since it uses less digits than its factorization.

392728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7026 (or 7022 counting only the distinct ones).

The product of its digits is 6048, while the sum is 31.

The square root of 392728 is about 626.6801416991. The cubic root of 392728 is about 73.2313918727.

The spelling of 392728 in words is "three hundred ninety-two thousand, seven hundred twenty-eight".