442425140 has 24 divisors (see below), whose sum is σ = 942181632. Its totient is φ = 174476960.

The previous prime is 442425133. The next prime is 442425157. The reversal of 442425140 is 41524244.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154364 + ... + 157203.

It is an arithmetic number, because the mean of its divisors is an integer number (39257568).

Almost surely, 2^442425140 is an apocalyptic number.

It is an amenable number.

442425140 is an abundant number, since it is smaller than the sum of its proper divisors (499756492).

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

442425140 is a wasteful number, since it uses less digits than its factorization.

442425140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311647 (or 311645 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 442425140 is about 21033.9045352973. The cubic root of 442425140 is about 761.9853102800.

Adding to 442425140 its reverse (41524244), we get a palindrome (483949384).

The spelling of 442425140 in words is "four hundred forty-two million, four hundred twenty-five thousand, one hundred forty".