422447993840 has 320 divisors, whose sum is σ = 1078559539200. Its totient is φ = 153402163200.

The previous prime is 422447993833. The next prime is 422447993857. The reversal of 422447993840 is 48399744224.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1085984366 + ... + 1085984754.

It is an arithmetic number, because the mean of its divisors is an integer number (3370498560).

Almost surely, 2^422447993840 is an apocalyptic number.

422447993840 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 422447993840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (539279769600).

422447993840 is an abundant number, since it is smaller than the sum of its proper divisors (656111545360).

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

422447993840 is a wasteful number, since it uses less digits than its factorization.

422447993840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776 (or 770 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 56.

The spelling of 422447993840 in words is "four hundred twenty-two billion, four hundred forty-seven million, nine hundred ninety-three thousand, eight hundred forty".