4000022 has 16 divisors (see below), whose sum is σ = 6743520. Its totient is φ = 1765632.

The previous prime is 3999971. The next prime is 4000037. The reversal of 4000022 is 2200004.

4000022 is a modest number, since divided by 22 gives 4 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 3999973 and 4000009.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2747 + ... + 3942.

It is an arithmetic number, because the mean of its divisors is an integer number (421470).

Almost surely, 2^4000022 is an apocalyptic number.

4000022 is a deficient number, since it is larger than the sum of its proper divisors (2743498).

4000022 is a wasteful number, since it uses less digits than its factorization.

4000022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6727.

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

The square root of 4000022 is about 2000.0054999924. The cubic root of 4000022 is about 158.7403962198.

Adding to 4000022 its reverse (2200004), we get a palindrome (6200026).

It can be divided in two parts, 400002 and 2, that added together give a palindrome (400004).

The spelling of 4000022 in words is "four million, twenty-two", and thus it is an aban number.