442400340223 has 32 divisors (see below), whose sum is σ = 469528690176. Its totient is φ = 415987448448.

The previous prime is 442400340211. The next prime is 442400340257. The reversal of 442400340223 is 322043004244.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442400340223 is a prime.

It is a super-2 number, since 2×442400340223² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442400340191 and 442400340200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442400340203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 603547165 + ... + 603547897.

It is an arithmetic number, because the mean of its divisors is an integer number (14672771568).

Almost surely, 2^442400340223 is an apocalyptic number.

442400340223 is a deficient number, since it is larger than the sum of its proper divisors (27128349953).

442400340223 is a wasteful number, since it uses less digits than its factorization.

442400340223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983.

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 442400340223 its reverse (322043004244), we get a palindrome (764443344467).

The spelling of 442400340223 in words is "four hundred forty-two billion, four hundred million, three hundred forty thousand, two hundred twenty-three".