436989 has 8 divisors (see below), whose sum is σ = 665920. Its totient is φ = 249696.

The previous prime is 436979. The next prime is 436993. The reversal of 436989 is 989634.

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

It is not a de Polignac number, because 436989 - 2⁴ = 436973 is a prime.

It is a super-2 number, since 2×436989² = 381918772242, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

436989 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 436989.

It is not an unprimeable number, because it can be changed into a prime (436979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10384 + ... + 10425.

It is an arithmetic number, because the mean of its divisors is an integer number (83240).

2⁴³⁶⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

436989 is a deficient number, since it is larger than the sum of its proper divisors (228931).

436989 is a wasteful number, since it uses less digits than its factorization.

436989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20819.

The product of its digits is 46656, while the sum is 39.

The square root of 436989 is about 661.0514352151. The cubic root of 436989 is about 75.8851566496.

The spelling of 436989 in words is "four hundred thirty-six thousand, nine hundred eighty-nine".