441228921 has 64 divisors (see below), whose sum is σ = 725286912. Its totient is φ = 233280000.

The previous prime is 441228917. The next prime is 441228961. The reversal of 441228921 is 129822144.

It is not a de Polignac number, because 441228921 - 2² = 441228917 is a prime.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (441228961) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1628016 + ... + 1628286.

It is an arithmetic number, because the mean of its divisors is an integer number (11332608).

Almost surely, 2^441228921 is an apocalyptic number.

441228921 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

441228921 is a deficient number, since it is larger than the sum of its proper divisors (284057991).

441228921 is a wasteful number, since it uses less digits than its factorization.

441228921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414.

The product of its digits is 9216, while the sum is 33.

The square root of 441228921 is about 21005.4497928514. The cubic root of 441228921 is about 761.2979442465.

It can be divided in two parts, 4412 and 28921, that added together give a palindrome (33333).

The spelling of 441228921 in words is "four hundred forty-one million, two hundred twenty-eight thousand, nine hundred twenty-one".