422145620 has 96 divisors (see below), whose sum is σ = 994519680. Its totient is φ = 149506560.

The previous prime is 422145613. The next prime is 422145637. The reversal of 422145620 is 26541224.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 422145620.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 681671 + ... + 682289.

It is an arithmetic number, because the mean of its divisors is an integer number (10359580).

Almost surely, 2^422145620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 422145620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (497259840).

422145620 is an abundant number, since it is smaller than the sum of its proper divisors (572374060).

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

422145620 is a wasteful number, since it uses less digits than its factorization.

422145620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745 (or 743 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 422145620 is about 20546.1826138093. The cubic root of 422145620 is about 750.1603331293.

Adding to 422145620 its reverse (26541224), we get a palindrome (448686844).

The spelling of 422145620 in words is "four hundred twenty-two million, one hundred forty-five thousand, six hundred twenty".