422445540 has 48 divisors (see below), whose sum is σ = 1290381120. Its totient is φ = 102410880.

The previous prime is 422445533. The next prime is 422445547. The reversal of 422445540 is 45544224.

It is an interprime number because it is at equal distance from previous prime (422445533) and next prime (422445547).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 422445498 and 422445507.

It is not an unprimeable number, because it can be changed into a prime (422445547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 319375 + ... + 320694.

It is an arithmetic number, because the mean of its divisors is an integer number (26882940).

Almost surely, 2^422445540 is an apocalyptic number.

It is an amenable number.

422445540 is an abundant number, since it is smaller than the sum of its proper divisors (867935580).

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

422445540 is a wasteful number, since it uses less digits than its factorization.

422445540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640092 (or 640090 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 30.

The square root of 422445540 is about 20553.4799973143. The cubic root of 422445540 is about 750.3379454787.

Adding to 422445540 its reverse (45544224), we get a palindrome (467989764).

The spelling of 422445540 in words is "four hundred twenty-two million, four hundred forty-five thousand, five hundred forty".