440538121 has 9 divisors (see below), whose sum is σ = 446688333. Its totient is φ = 434472300.

The previous prime is 440538103. The next prime is 440538127. The reversal of 440538121 is 121835044.

The square root of 440538121 is 20989.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 440538121 - 2⁵ = 440538089 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 440538121.

It is not an unprimeable number, because it can be changed into a prime (440538127) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2917396 + ... + 2917546.

It is an arithmetic number, because the mean of its divisors is an integer number (49632037).

Almost surely, 2^440538121 is an apocalyptic number.

440538121 is the 20989-th square number.

440538121 is the 10495-th centered octagonal number.

It is an amenable number.

440538121 is a deficient number, since it is larger than the sum of its proper divisors (6150212).

440538121 is an frugal number, since it uses more digits than its factorization.

440538121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The cubic root of 440538121 is about 760.9004338003.

The spelling of 440538121 in words is "four hundred forty million, five hundred thirty-eight thousand, one hundred twenty-one".