4638729 has 8 divisors (see below), whose sum is σ = 6200992. Its totient is φ = 3084480.

The previous prime is 4638721. The next prime is 4638737. The reversal of 4638729 is 9278364.

It is an interprime number because it is at equal distance from previous prime (4638721) and next prime (4638737).

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

It is not a de Polignac number, because 4638729 - 2³ = 4638721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4638721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487 + ... + 3084.

It is an arithmetic number, because the mean of its divisors is an integer number (775124).

Almost surely, 2^4638729 is an apocalyptic number.

It is an amenable number.

4638729 is a deficient number, since it is larger than the sum of its proper divisors (1562263).

4638729 is a wasteful number, since it uses less digits than its factorization.

4638729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4007.

The product of its digits is 72576, while the sum is 39.

The square root of 4638729 is about 2153.7708791791. The cubic root of 4638729 is about 166.7757876512.

The spelling of 4638729 in words is "four million, six hundred thirty-eight thousand, seven hundred twenty-nine".