440553421 has 16 divisors (see below), whose sum is σ = 549808128. Its totient is φ = 342946800.

The previous prime is 440553409. The next prime is 440553427. The reversal of 440553421 is 124355044.

It is not a de Polignac number, because 440553421 - 2⁵ = 440553389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 440553421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440553427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98136 + ... + 102526.

It is an arithmetic number, because the mean of its divisors is an integer number (34363008).

Almost surely, 2^440553421 is an apocalyptic number.

It is an amenable number.

440553421 is a deficient number, since it is larger than the sum of its proper divisors (109254707).

440553421 is a wasteful number, since it uses less digits than its factorization.

440553421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5712.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 440553421 is about 20989.3644734661. The cubic root of 440553421 is about 760.9092424530.

The spelling of 440553421 in words is "four hundred forty million, five hundred fifty-three thousand, four hundred twenty-one".