442640450 has 24 divisors (see below), whose sum is σ = 940927872. Its totient is φ = 151762320.

The previous prime is 442640449. The next prime is 442640453. The reversal of 442640450 is 54046244.

It is a happy number.

It is a super-3 number, since 3×442640450³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (442640453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 631994 + ... + 632693.

It is an arithmetic number, because the mean of its divisors is an integer number (39205328).

Almost surely, 2^442640450 is an apocalyptic number.

442640450 is an abundant number, since it is smaller than the sum of its proper divisors (498287422).

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

442640450 is a wasteful number, since it uses less digits than its factorization.

442640450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264706 (or 1264701 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 29.

The square root of 442640450 is about 21039.0220780340. The cubic root of 442640450 is about 762.1088991355.

Adding to 442640450 its reverse (54046244), we get a palindrome (496686694).

The spelling of 442640450 in words is "four hundred forty-two million, six hundred forty thousand, four hundred fifty".