40822 has 4 divisors (see below), whose sum is σ = 61236. Its totient is φ = 20410.

The previous prime is 40819. The next prime is 40823. The reversal of 40822 is 22804.

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

It is a junction number, because it is equal to n+sod(n) for n = 40796 and 40805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40823) 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, 10204 + ... + 10207.

It is an arithmetic number, because the mean of its divisors is an integer number (15309).

2⁴⁰⁸²² is an apocalyptic number.

40822 is a deficient number, since it is larger than the sum of its proper divisors (20414).

40822 is a wasteful number, since it uses less digits than its factorization.

40822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20413.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 40822 is about 202.0445495429. The cubic root of 40822 is about 34.4321989847.

The spelling of 40822 in words is "forty thousand, eight hundred twenty-two".