440397889 has 4 divisors (see below), whose sum is σ = 447862320. Its totient is φ = 432933460.

The previous prime is 440397887. The next prime is 440397907. The reversal of 440397889 is 988793044.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 440397889 - 2¹ = 440397887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440397883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3732127 + ... + 3732244.

It is an arithmetic number, because the mean of its divisors is an integer number (111965580).

Almost surely, 2^440397889 is an apocalyptic number.

It is an amenable number.

440397889 is a deficient number, since it is larger than the sum of its proper divisors (7464431).

440397889 is an equidigital number, since it uses as much as digits as its factorization.

440397889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7464430.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The square root of 440397889 is about 20985.6591271277. The cubic root of 440397889 is about 760.8196886779.

The spelling of 440397889 in words is "four hundred forty million, three hundred ninety-seven thousand, eight hundred eighty-nine".