442420646840 has 32 divisors (see below), whose sum is σ = 998266448880. Its totient is φ = 176466926592.

The previous prime is 442420646791. The next prime is 442420646851. The reversal of 442420646840 is 48646024244.

It is a junction number, because it is equal to n+sod(n) for n = 442420646791 and 442420646800.

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, 15652334 + ... + 15680573.

Almost surely, 2^442420646840 is an apocalyptic number.

442420646840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

442420646840 is an abundant number, since it is smaller than the sum of its proper divisors (555845802040).

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

442420646840 is a wasteful number, since it uses less digits than its factorization.

442420646840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31333271 (or 31333267 counting only the distinct ones).

The product of its (nonzero) digits is 1179648, while the sum is 44.

The spelling of 442420646840 in words is "four hundred forty-two billion, four hundred twenty million, six hundred forty-six thousand, eight hundred forty".