4004638 has 8 divisors (see below), whose sum is σ = 6553080. Its totient is φ = 1820280.

The previous prime is 4004629. The next prime is 4004653. The reversal of 4004638 is 8364004.

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

It is a super-2 number, since 2×4004638² = 32074251022088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90993 + ... + 91036.

It is an arithmetic number, because the mean of its divisors is an integer number (819135).

Almost surely, 2^4004638 is an apocalyptic number.

4004638 is a deficient number, since it is larger than the sum of its proper divisors (2548442).

4004638 is a wasteful number, since it uses less digits than its factorization.

4004638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182042.

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

The square root of 4004638 is about 2001.1591640847. The cubic root of 4004638 is about 158.8014345498.

It can be divided in two parts, 4004 and 638, that multiplied together give a palindrome (2554552).

The spelling of 4004638 in words is "four million, four thousand, six hundred thirty-eight".