440809989 has 16 divisors (see below), whose sum is σ = 596686272. Its totient is φ = 289415808.

The previous prime is 440809979. The next prime is 440810033. The reversal of 440809989 is 989908044.

It is not a de Polignac number, because 440809989 - 2¹³ = 440801797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440809909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220854 + ... + 222840.

It is an arithmetic number, because the mean of its divisors is an integer number (37292892).

Almost surely, 2^440809989 is an apocalyptic number.

It is an amenable number.

440809989 is a deficient number, since it is larger than the sum of its proper divisors (155876283).

440809989 is a wasteful number, since it uses less digits than its factorization.

440809989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3076.

The product of its (nonzero) digits is 746496, while the sum is 51.

The square root of 440809989 is about 20995.4754411516. The cubic root of 440809989 is about 761.0569256981.

The spelling of 440809989 in words is "four hundred forty million, eight hundred nine thousand, nine hundred eighty-nine".