40010 has 8 divisors (see below), whose sum is σ = 72036. Its totient is φ = 16000.

The previous prime is 40009. The next prime is 40013. The reversal of 40010 is 1004.

40010 = T₁₂₄ + T₁₂₅ + ... + T₁₂₈.

It can be written as a sum of positive squares in 2 ways, for example, as 34969 + 5041 = 187^2 + 71^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (5).

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 39976 and 40003.

It is not an unprimeable number, because it can be changed into a prime (40013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1991 + ... + 2010.

2⁴⁰⁰¹⁰ is an apocalyptic number.

40010 is a deficient number, since it is larger than the sum of its proper divisors (32026).

40010 is a wasteful number, since it uses less digits than its factorization.

40010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4008.

The product of its (nonzero) digits is 4, while the sum is 5.

The square root of 40010 is about 200.0249984377. The cubic root of 40010 is about 34.2023686560.

Adding to 40010 its reverse (1004), we get a palindrome (41014).

The spelling of 40010 in words is "forty thousand, ten", and thus it is an iban number.