440439369 has 4 divisors (see below), whose sum is σ = 587252496. Its totient is φ = 293626244.

The previous prime is 440439359. The next prime is 440439371. The reversal of 440439369 is 963934044.

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 440439369 - 2⁴ = 440439353 is a prime.

It is a super-2 number, since 2×440439369² = 387973675530236322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 440439369.

It is not an unprimeable number, because it can be changed into a prime (440439319) 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, 73406559 + ... + 73406564.

It is an arithmetic number, because the mean of its divisors is an integer number (146813124).

Almost surely, 2^440439369 is an apocalyptic number.

It is an amenable number.

440439369 is a deficient number, since it is larger than the sum of its proper divisors (146813127).

440439369 is a wasteful number, since it uses less digits than its factorization.

440439369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146813126.

The product of its (nonzero) digits is 279936, while the sum is 42.

The square root of 440439369 is about 20986.6473978099. The cubic root of 440439369 is about 760.8435745099.

The spelling of 440439369 in words is "four hundred forty million, four hundred thirty-nine thousand, three hundred sixty-nine".