420404023 has 8 divisors (see below), whose sum is σ = 452916800. Its totient is φ = 387916128.

The previous prime is 420404011. The next prime is 420404053. The reversal of 420404023 is 320404024.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420404023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420404053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43858 + ... + 52576.

It is an arithmetic number, because the mean of its divisors is an integer number (56614600).

Almost surely, 2^420404023 is an apocalyptic number.

420404023 is a deficient number, since it is larger than the sum of its proper divisors (32512777).

420404023 is a wasteful number, since it uses less digits than its factorization.

420404023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12441.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 420404023 is about 20503.7563143927. The cubic root of 420404023 is about 749.1272948341.

Adding to 420404023 its reverse (320404024), we get a palindrome (740808047).

Subtracting from 420404023 its reverse (320404024), we obtain a palindrome (99999999).

The spelling of 420404023 in words is "four hundred twenty million, four hundred four thousand, twenty-three".