40814 has 4 divisors (see below), whose sum is σ = 61224. Its totient is φ = 20406.

The previous prime is 40813. The next prime is 40819. The reversal of 40814 is 41804.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40792 and 40801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10202 + ... + 10205.

It is an arithmetic number, because the mean of its divisors is an integer number (15306).

2⁴⁰⁸¹⁴ is an apocalyptic number.

40814 is a deficient number, since it is larger than the sum of its proper divisors (20410).

40814 is a wasteful number, since it uses less digits than its factorization.

40814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20409.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 40814 is about 202.0247509589. The cubic root of 40814 is about 34.4299495800.

Subtracting 40814 from its reverse (41804), we obtain a triangular number (990 = T₄₄).

The spelling of 40814 in words is "forty thousand, eight hundred fourteen".