442588140 has 72 divisors (see below), whose sum is σ = 1388827440. Its totient is φ = 113952384.

The previous prime is 442588129. The next prime is 442588163. The reversal of 442588140 is 41885244.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 442588095 and 442588104.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37174 + ... + 47613.

It is an arithmetic number, because the mean of its divisors is an integer number (19289270).

Almost surely, 2^442588140 is an apocalyptic number.

It is an amenable number.

442588140 is an abundant number, since it is smaller than the sum of its proper divisors (946239300).

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

442588140 is a wasteful number, since it uses less digits than its factorization.

442588140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84831 (or 84826 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 36.

The square root of 442588140 is about 21037.7788751569. The cubic root of 442588140 is about 762.0788766594.

The spelling of 442588140 in words is "four hundred forty-two million, five hundred eighty-eight thousand, one hundred forty".