421444433 has 8 divisors (see below), whose sum is σ = 465637248. Its totient is φ = 379407424.

The previous prime is 421444409. The next prime is 421444447. The reversal of 421444433 is 334444124.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 421444433 - 2¹⁰ = 421443409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 421444396 and 421444405.

It is not an unprimeable number, because it can be changed into a prime (421444483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 538541 + ... + 539322.

It is an arithmetic number, because the mean of its divisors is an integer number (58204656).

Almost surely, 2^421444433 is an apocalyptic number.

It is an amenable number.

421444433 is a deficient number, since it is larger than the sum of its proper divisors (44192815).

421444433 is a wasteful number, since it uses less digits than its factorization.

421444433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077903.

The product of its digits is 18432, while the sum is 29.

The square root of 421444433 is about 20529.1118414801. Note that the first 3 decimals coincide. The cubic root of 421444433 is about 749.7447623334.

Adding to 421444433 its reverse (334444124), we get a palindrome (755888557).

The spelling of 421444433 in words is "four hundred twenty-one million, four hundred forty-four thousand, four hundred thirty-three".