440842 has 4 divisors (see below), whose sum is σ = 661266. Its totient is φ = 220420.

The previous prime is 440831. The next prime is 440849. The reversal of 440842 is 248044.

440842 is nontrivially palindromic in base 7.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 434281 + 6561 = 659^2 + 81^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (440849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110209 + ... + 110212.

2⁴⁴⁰⁸⁴² is an apocalyptic number.

440842 is a deficient number, since it is larger than the sum of its proper divisors (220424).

440842 is a wasteful number, since it uses less digits than its factorization.

440842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220423.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 440842 is about 663.9593361043. The cubic root of 440842 is about 76.1075347546.

Adding to 440842 its reverse (248044), we get a palindrome (688886).

It can be divided in two parts, 4408 and 42, that multiplied together give a triangular number (185136 = T₆₀₈).

The spelling of 440842 in words is "four hundred forty thousand, eight hundred forty-two".