378728 has 16 divisors (see below), whose sum is σ = 811680. Its totient is φ = 162288.

The previous prime is 378713. The next prime is 378733. The reversal of 378728 is 827873.

It is a happy number.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

378728 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 in 3 ways as a sum of consecutive naturals, for example, 3326 + ... + 3437.

It is an arithmetic number, because the mean of its divisors is an integer number (50730).

2³⁷⁸⁷²⁸ is an apocalyptic number.

It is an amenable number.

378728 is an abundant number, since it is smaller than the sum of its proper divisors (432952).

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

378728 is a wasteful number, since it uses less digits than its factorization.

378728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6776 (or 6772 counting only the distinct ones).

The product of its digits is 18816, while the sum is 35.

The square root of 378728 is about 615.4088072168. The cubic root of 378728 is about 72.3506557129.

The spelling of 378728 in words is "three hundred seventy-eight thousand, seven hundred twenty-eight".