442044421 has 32 divisors (see below), whose sum is σ = 583511040. Its totient is φ = 324919296.

The previous prime is 442044413. The next prime is 442044431. The reversal of 442044421 is 124440244.

It is not a de Polignac number, because 442044421 - 2³ = 442044413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442044431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120405 + ... + 124021.

It is an arithmetic number, because the mean of its divisors is an integer number (18234720).

Almost surely, 2^442044421 is an apocalyptic number.

It is an amenable number.

442044421 is a deficient number, since it is larger than the sum of its proper divisors (141466619).

442044421 is a wasteful number, since it uses less digits than its factorization.

442044421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3733.

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

The square root of 442044421 is about 21024.8524608379. The cubic root of 442044421 is about 761.7666777834.

Adding to 442044421 its reverse (124440244), we get a palindrome (566484665).

It can be divided in two parts, 4420 and 44421, that added together give a square (48841 = 221²).

The spelling of 442044421 in words is "four hundred forty-two million, forty-four thousand, four hundred twenty-one".