440442221 has 8 divisors (see below), whose sum is σ = 446342400. Its totient is φ = 434563360.

The previous prime is 440442187. The next prime is 440442241. The reversal of 440442221 is 122244044.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440442221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440442241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38660 + ... + 48738.

It is an arithmetic number, because the mean of its divisors is an integer number (55792800).

Almost surely, 2^440442221 is an apocalyptic number.

It is an amenable number.

440442221 is a deficient number, since it is larger than the sum of its proper divisors (5900179).

440442221 is a wasteful number, since it uses less digits than its factorization.

440442221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10659.

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 440442221 is about 20986.7153456657. The cubic root of 440442221 is about 760.8452167497.

Adding to 440442221 its reverse (122244044), we get a palindrome (562686265).

The spelling of 440442221 in words is "four hundred forty million, four hundred forty-two thousand, two hundred twenty-one".