4006422 has 40 divisors (see below), whose sum is σ = 10262736. Its totient is φ = 1144368.

The previous prime is 4006417. The next prime is 4006423. The reversal of 4006422 is 2246004.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 4006395 and 4006404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4006423) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 633 + ... + 2900.

Almost surely, 2^4006422 is an apocalyptic number.

4006422 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

4006422 is an abundant number, since it is smaller than the sum of its proper divisors (6256314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4006422 is a wasteful number, since it uses less digits than its factorization.

4006422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3554 (or 3545 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 4006422 is about 2001.6048561092. The cubic root of 4006422 is about 158.8250121866.

The spelling of 4006422 in words is "four million, six thousand, four hundred twenty-two".