441428661 has 6 divisors (see below), whose sum is σ = 637619190. Its totient is φ = 294285768.

The previous prime is 441428621. The next prime is 441428683. The reversal of 441428661 is 166824144.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 440748036 + 680625 = 20994^2 + 825^2 .

It is not a de Polignac number, because 441428661 - 2¹⁵ = 441395893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (441428621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24523806 + ... + 24523823.

It is an arithmetic number, because the mean of its divisors is an integer number (106269865).

Almost surely, 2^441428661 is an apocalyptic number.

It is an amenable number.

441428661 is a deficient number, since it is larger than the sum of its proper divisors (196190529).

441428661 is a wasteful number, since it uses less digits than its factorization.

441428661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49047635 (or 49047632 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 441428661 is about 21010.2037353282. The cubic root of 441428661 is about 761.4128042842.

The spelling of 441428661 in words is "four hundred forty-one million, four hundred twenty-eight thousand, six hundred sixty-one".