40494 has 16 divisors (see below), whose sum is σ = 85968. Its totient is φ = 12672.

The previous prime is 40493. The next prime is 40499. The reversal of 40494 is 49404.

It is a happy number.

It is a Curzon number.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 40494.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97 + ... + 300.

It is an arithmetic number, because the mean of its divisors is an integer number (5373).

2⁴⁰⁴⁹⁴ is an apocalyptic number.

40494 is an abundant number, since it is smaller than the sum of its proper divisors (45474).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42984).

40494 is a wasteful number, since it uses less digits than its factorization.

40494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 40494 is about 201.2312103030. The cubic root of 40494 is about 34.3397313199.

Adding to 40494 its reverse (49404), we get a palindrome (89898).

The spelling of 40494 in words is "forty thousand, four hundred ninety-four".