420400202 has 8 divisors (see below), whose sum is σ = 630831396. Its totient is φ = 210123072.

The previous prime is 420400199. The next prime is 420400223. The reversal of 420400202 is 202004024.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 352650841 + 67749361 = 18779^2 + 8231^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31433 + ... + 42764.

Almost surely, 2^420400202 is an apocalyptic number.

420400202 is a deficient number, since it is larger than the sum of its proper divisors (210431194).

420400202 is a wasteful number, since it uses less digits than its factorization.

420400202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77032.

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 420400202 is about 20503.6631361325. The cubic root of 420400202 is about 749.1250252522.

Adding to 420400202 its reverse (202004024), we get a palindrome (622404226).

The spelling of 420400202 in words is "four hundred twenty million, four hundred thousand, two hundred two".