40490 has 8 divisors (see below), whose sum is σ = 72900. Its totient is φ = 16192.

The previous prime is 40487. The next prime is 40493. The reversal of 40490 is 9404.

40490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40487) and next prime (40493).

It can be written as a sum of positive squares in 2 ways, for example, as 38809 + 1681 = 197^2 + 41^2 .

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

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 40490.

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 3 ways as a sum of consecutive naturals, for example, 2015 + ... + 2034.

2⁴⁰⁴⁹⁰ is an apocalyptic number.

40490 is a deficient number, since it is larger than the sum of its proper divisors (32410).

40490 is a wasteful number, since it uses less digits than its factorization.

40490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4056.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 40490 is about 201.2212712414. The cubic root of 40490 is about 34.3386005890.

Adding to 40490 its reverse (9404), we get a palindrome (49894).

It can be divided in two parts, 404 and 90, that added together give a palindrome (494).

The spelling of 40490 in words is "forty thousand, four hundred ninety".