420202404 has 144 divisors (see below), whose sum is σ = 1181660480. Its totient is φ = 130170240.

The previous prime is 420202403. The next prime is 420202439. The reversal of 420202404 is 404202024.

420202404 is a `hidden beast` number, since 420 + 2 + 0 + 240 + 4 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (420202403) 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, 1126362 + ... + 1126734.

Almost surely, 2^420202404 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 420202404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (590830240).

420202404 is an abundant number, since it is smaller than the sum of its proper divisors (761458076).

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

420202404 is a wasteful number, since it uses less digits than its factorization.

420202404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 458 counting only the distinct ones).

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

The square root of 420202404 is about 20498.8390890801. The cubic root of 420202404 is about 749.0075192219.

Adding to 420202404 its reverse (404202024), we get a palindrome (824404428).

The spelling of 420202404 in words is "four hundred twenty million, two hundred two thousand, four hundred four".