422442540 has 180 divisors, whose sum is σ = 1435929264. Its totient is φ = 103918464.

The previous prime is 422442529. The next prime is 422442547. The reversal of 422442540 is 45244224.

It is a tau number, because it is divible by the number of its divisors (180).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (422442547) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 273009 + ... + 274551.

Almost surely, 2^422442540 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 422442540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (717964632).

422442540 is an abundant number, since it is smaller than the sum of its proper divisors (1013486724).

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

422442540 is a wasteful number, since it uses less digits than its factorization.

422442540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590 (or 1566 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 27.

The square root of 422442540 is about 20553.4070168427. The cubic root of 422442540 is about 750.3361692978.

Adding to 422442540 its reverse (45244224), we get a palindrome (467686764).

It can be divided in two parts, 4224 and 42540, that added together give a palindrome (46764).

The spelling of 422442540 in words is "four hundred twenty-two million, four hundred forty-two thousand, five hundred forty".