420722500 has 60 divisors (see below), whose sum is σ = 1003741200. Its totient is φ = 152980000.

The previous prime is 420722447. The next prime is 420722501. The reversal of 420722500 is 5227024.

420722500 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (420722501) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19851 + ... + 35149.

It is an arithmetic number, because the mean of its divisors is an integer number (16729020).

Almost surely, 2^420722500 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 420722500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (501870600).

420722500 is an abundant number, since it is smaller than the sum of its proper divisors (583018700).

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

420722500 is a wasteful number, since it uses less digits than its factorization.

420722500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15334 (or 15317 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 420722500 is about 20511.5211527571. The cubic root of 420722500 is about 749.3164141736.

Adding to 420722500 its reverse (5227024), we get a palindrome (425949524).

The spelling of 420722500 in words is "four hundred twenty million, seven hundred twenty-two thousand, five hundred".