440399969 has 8 divisors (see below), whose sum is σ = 445186560. Its totient is φ = 435639600.

The previous prime is 440399933. The next prime is 440399989. The reversal of 440399969 is 969993044.

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-440399969 is a prime.

It is a super-2 number, since 2×440399969² = 387904265390401922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 440399969.

It is not an unprimeable number, because it can be changed into a prime (440399989) 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 7 ways as a sum of consecutive naturals, for example, 28202 + ... + 40940.

It is an arithmetic number, because the mean of its divisors is an integer number (55648320).

Almost surely, 2^440399969 is an apocalyptic number.

It is an amenable number.

440399969 is a deficient number, since it is larger than the sum of its proper divisors (4786591).

440399969 is a wasteful number, since it uses less digits than its factorization.

440399969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13111.

The product of its (nonzero) digits is 1889568, while the sum is 53.

The square root of 440399969 is about 20985.7086847216. The cubic root of 440399969 is about 760.8208864603.

The spelling of 440399969 in words is "four hundred forty million, three hundred ninety-nine thousand, nine hundred sixty-nine".