420622500 has 120 divisors (see below), whose sum is σ = 1298959200. Its totient is φ = 105536000.

The previous prime is 420622493. The next prime is 420622507. The reversal of 420622500 is 5226024.

It is an interprime number because it is at equal distance from previous prime (420622493) and next prime (420622507).

It is not an unprimeable number, because it can be changed into a prime (420622507) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 125851 + ... + 129149.

It is an arithmetic number, because the mean of its divisors is an integer number (10824660).

Almost surely, 2^420622500 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 420622500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (649479600).

420622500 is an abundant number, since it is smaller than the sum of its proper divisors (878336700).

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

420622500 is a wasteful number, since it uses less digits than its factorization.

420622500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3343 (or 3326 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 420622500 is about 20509.0833534802. The cubic root of 420622500 is about 749.2570420388.

Adding to 420622500 its reverse (5226024), we get a palindrome (425848524).

The spelling of 420622500 in words is "four hundred twenty million, six hundred twenty-two thousand, five hundred".