40489 has 4 divisors (see below), whose sum is σ = 42640. Its totient is φ = 38340.

The previous prime is 40487. The next prime is 40493. The reversal of 40489 is 98404.

40489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40489 - 2¹ = 40487 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 40489.

It is not an unprimeable number, because it can be changed into a prime (40483) 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, 1047 + ... + 1084.

It is an arithmetic number, because the mean of its divisors is an integer number (10660).

2⁴⁰⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

40489 is a deficient number, since it is larger than the sum of its proper divisors (2151).

40489 is a wasteful number, since it uses less digits than its factorization.

40489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2150.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 40489 is about 201.2187863993. The cubic root of 40489 is about 34.3383178947.

It can be divided in two parts, 40 and 489, that added together give a square (529 = 23²).

The spelling of 40489 in words is "forty thousand, four hundred eighty-nine".