4728729 has 4 divisors (see below), whose sum is σ = 6304976. Its totient is φ = 3152484.

The previous prime is 4728697. The next prime is 4728733. The reversal of 4728729 is 9278274.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4728729 - 2⁵ = 4728697 is a prime.

It is a d-powerful number, because it can be written as 4⁴ + 7 + 2⁸ + 8² + 7⁴ + 2²² + 9⁶ .

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4728749) 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, 788119 + ... + 788124.

It is an arithmetic number, because the mean of its divisors is an integer number (1576244).

Almost surely, 2^4728729 is an apocalyptic number.

It is an amenable number.

4728729 is a deficient number, since it is larger than the sum of its proper divisors (1576247).

4728729 is a wasteful number, since it uses less digits than its factorization.

4728729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576246.

The product of its digits is 56448, while the sum is 39.

The square root of 4728729 is about 2174.5640942497. The cubic root of 4728729 is about 167.8474735252.

The spelling of 4728729 in words is "four million, seven hundred twenty-eight thousand, seven hundred twenty-nine".