396442 has 4 divisors (see below), whose sum is σ = 594666. Its totient is φ = 198220.

The previous prime is 396437. The next prime is 396443. The reversal of 396442 is 244693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244693 = 179 ⋅1367.

It can be written as a sum of positive squares in only one way, i.e., 210681 + 185761 = 459^2 + 431^2 .

It is a d-powerful number, because it can be written as 3⁷ + 9 + 4⁵ + 6 + 4⁹ + 2¹⁷ .

It is a self number, because there is not a number n which added to its sum of digits gives 396442.

It is not an unprimeable number, because it can be changed into a prime (396443) by changing a digit.

396442 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, 99109 + ... + 99112.

2³⁹⁶⁴⁴² is an apocalyptic number.

396442 is a deficient number, since it is larger than the sum of its proper divisors (198224).

396442 is a wasteful number, since it uses less digits than its factorization.

396442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198223.

The product of its digits is 5184, while the sum is 28.

The square root of 396442 is about 629.6364030137. The cubic root of 396442 is about 73.4615159419.

It can be divided in two parts, 396 and 442, that added together give a palindrome (838).

The spelling of 396442 in words is "three hundred ninety-six thousand, four hundred forty-two".