400022 has 8 divisors (see below), whose sum is σ = 685776. Its totient is φ = 171432.

The previous prime is 400009. The next prime is 400031. The reversal of 400022 is 220004.

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

It is an Ulam number.

It is a zygodrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 399982 and 400009.

It is a congruent number.

It is an unprimeable number.

400022 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14273 + ... + 14300.

It is an arithmetic number, because the mean of its divisors is an integer number (85722).

2⁴⁰⁰⁰²² is an apocalyptic number.

400022 is a deficient number, since it is larger than the sum of its proper divisors (285754).

400022 is a wasteful number, since it uses less digits than its factorization.

400022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28582.

The product of its (nonzero) digits is 16, while the sum is 8.

The square root of 400022 is about 632.4729243217. The cubic root of 400022 is about 73.6819807596.

Adding to 400022 its reverse (220004), we get a palindrome (620026).

It can be divided in two parts, 40002 and 2, that added together give a palindrome (40004).

The spelling of 400022 in words is "four hundred thousand, twenty-two", and thus it is an iban number.