420444455 has 16 divisors (see below), whose sum is σ = 515211840. Its totient is φ = 329311488.

The previous prime is 420444433. The next prime is 420444457. The reversal of 420444455 is 554444024.

420444455 = 51² + 52² + ... + 1080².

It is a cyclic number.

It is not a de Polignac number, because 420444455 - 2¹⁸ = 420182311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420444457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41249 + ... + 50421.

It is an arithmetic number, because the mean of its divisors is an integer number (32200740).

Almost surely, 2^420444455 is an apocalyptic number.

420444455 is a deficient number, since it is larger than the sum of its proper divisors (94767385).

420444455 is a wasteful number, since it uses less digits than its factorization.

420444455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9370.

The product of its (nonzero) digits is 51200, while the sum is 32.

The square root of 420444455 is about 20504.7422563660. The cubic root of 420444455 is about 749.1513096247.

Adding to 420444455 its reverse (554444024), we get a palindrome (974888479).

The spelling of 420444455 in words is "four hundred twenty million, four hundred forty-four thousand, four hundred fifty-five".