4639138 has 8 divisors (see below), whose sum is σ = 7952832. Its totient is φ = 1988196.

The previous prime is 4639133. The next prime is 4639139. The reversal of 4639138 is 8319364.

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

It is not an unprimeable number, because it can be changed into a prime (4639133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165670 + ... + 165697.

It is an arithmetic number, because the mean of its divisors is an integer number (994104).

Almost surely, 2^4639138 is an apocalyptic number.

4639138 is a deficient number, since it is larger than the sum of its proper divisors (3313694).

4639138 is a wasteful number, since it uses less digits than its factorization.

4639138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331376.

The product of its digits is 15552, while the sum is 34.

The square root of 4639138 is about 2153.8658268332. The cubic root of 4639138 is about 166.7806890866.

It can be divided in two parts, 4 and 639138, that multiplied together give a palindrome (2556552).

The spelling of 4639138 in words is "four million, six hundred thirty-nine thousand, one hundred thirty-eight".