4006438 has 8 divisors (see below), whose sum is σ = 6156360. Its totient is φ = 1954320.

The previous prime is 4006423. The next prime is 4006451. The reversal of 4006438 is 8346004.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24348 + ... + 24511.

It is an arithmetic number, because the mean of its divisors is an integer number (769545).

Almost surely, 2^4006438 is an apocalyptic number.

4006438 is a deficient number, since it is larger than the sum of its proper divisors (2149922).

4006438 is a wasteful number, since it uses less digits than its factorization.

4006438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48902.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 4006438 is about 2001.6088528981. The cubic root of 4006438 is about 158.8252236135.

It can be divided in two parts, 4006 and 438, that added together give a palindrome (4444).

The spelling of 4006438 in words is "four million, six thousand, four hundred thirty-eight".