395731728 has 120 divisors (see below), whose sum is σ = 1292798208. Its totient is φ = 110647296.

The previous prime is 395731723. The next prime is 395731741. The reversal of 395731728 is 827137593.

It is a happy number.

395731728 is a `hidden beast` number, since 3 + 9 + 573 + 1 + 72 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (395731723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43200 + ... + 51552.

Almost surely, 2^395731728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 395731728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (646399104).

395731728 is an abundant number, since it is smaller than the sum of its proper divisors (897066480).

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

395731728 is a wasteful number, since it uses less digits than its factorization.

395731728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8421 (or 8412 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 395731728 is about 19893.0070125157. The cubic root of 395731728 is about 734.1761809583.

The spelling of 395731728 in words is "three hundred ninety-five million, seven hundred thirty-one thousand, seven hundred twenty-eight".