421420444 has 36 divisors (see below), whose sum is σ = 781012960. Its totient is φ = 198918720.

The previous prime is 421420423. The next prime is 421420451. The reversal of 421420444 is 444024124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 165904 + ... + 168424.

Almost surely, 2^421420444 is an apocalyptic number.

It is an amenable number.

421420444 is a deficient number, since it is larger than the sum of its proper divisors (359592516).

421420444 is a wasteful number, since it uses less digits than its factorization.

421420444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2650 (or 2625 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 25.

The square root of 421420444 is about 20528.5275653175. The cubic root of 421420444 is about 749.7305366791.

Adding to 421420444 its reverse (444024124), we get a palindrome (865444568).

The spelling of 421420444 in words is "four hundred twenty-one million, four hundred twenty thousand, four hundred forty-four".