442431140 has 24 divisors (see below), whose sum is σ = 929577600. Its totient is φ = 176882528.

The previous prime is 442431133. The next prime is 442431149. The reversal of 442431140 is 41134244.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (442431149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46511 + ... + 55209.

It is an arithmetic number, because the mean of its divisors is an integer number (38732400).

Almost surely, 2^442431140 is an apocalyptic number.

It is an amenable number.

442431140 is an abundant number, since it is smaller than the sum of its proper divisors (487146460).

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

442431140 is a wasteful number, since it uses less digits than its factorization.

442431140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11251 (or 11249 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 442431140 is about 21034.0471616853. The cubic root of 442431140 is about 761.9887548486.

Adding to 442431140 its reverse (41134244), we get a palindrome (483565384).

The spelling of 442431140 in words is "four hundred forty-two million, four hundred thirty-one thousand, one hundred forty".