442140522040 has 144 divisors (see below), whose sum is σ = 1173332553480. Its totient is φ = 149510914560.

The previous prime is 442140522037. The next prime is 442140522073. The reversal of 442140522040 is 40225041244.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10423675 + ... + 10466005.

Almost surely, 2^442140522040 is an apocalyptic number.

442140522040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 442140522040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (586666276740).

442140522040 is an abundant number, since it is smaller than the sum of its proper divisors (731192031440).

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

442140522040 is a wasteful number, since it uses less digits than its factorization.

442140522040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42502 (or 42418 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 28.

Adding to 442140522040 its reverse (40225041244), we get a palindrome (482365563284).

The spelling of 442140522040 in words is "four hundred forty-two billion, one hundred forty million, five hundred twenty-two thousand, forty".