202422420 has 144 divisors (see below), whose sum is σ = 637797888. Its totient is φ = 51932160.

The previous prime is 202422419. The next prime is 202422427. The reversal of 202422420 is 24224202.

202422420 is a `hidden beast` number, since 2 + 0 + 242 + 2 + 420 = 666.

It is a super-2 number, since 2×202422420² = 81949672237312800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 202422393 and 202422402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202422427) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 600492 + ... + 600828.

It is an arithmetic number, because the mean of its divisors is an integer number (4429152).

Almost surely, 2^202422420 is an apocalyptic number.

202422420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 202422420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318898944).

202422420 is an abundant number, since it is smaller than the sum of its proper divisors (435375468).

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

202422420 is a wasteful number, since it uses less digits than its factorization.

202422420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470 (or 465 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 202422420 is about 14227.5233262856. The cubic root of 202422420 is about 587.1551451320.

Adding to 202422420 its reverse (24224202), we get a palindrome (226646622).

The spelling of 202422420 in words is "two hundred two million, four hundred twenty-two thousand, four hundred twenty".