422817085440 has 576 divisors, whose sum is σ = 1513236816000. Its totient is φ = 109117440000.

The previous prime is 422817085429. The next prime is 422817085459. The reversal of 422817085440 is 44580718224.

422817085440 is a `hidden beast` number, since 4 + 22 + 81 + 7 + 0 + 8 + 544 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 563005065 + ... + 563005815.

It is an arithmetic number, because the mean of its divisors is an integer number (2627147250).

Almost surely, 2^422817085440 is an apocalyptic number.

422817085440 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 422817085440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (756618408000).

422817085440 is an abundant number, since it is smaller than the sum of its proper divisors (1090419730560).

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

422817085440 is a wasteful number, since it uses less digits than its factorization.

422817085440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974 (or 951 counting only the distinct ones).

The product of its (nonzero) digits is 573440, while the sum is 45.

The spelling of 422817085440 in words is "four hundred twenty-two billion, eight hundred seventeen million, eighty-five thousand, four hundred forty".