4728991 has 4 divisors (see below), whose sum is σ = 4733352. Its totient is φ = 4724632.

The previous prime is 4728989. The next prime is 4729033. The reversal of 4728991 is 1998274.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4728991 - 2¹ = 4728989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4728931) 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, 861 + ... + 3193.

It is an arithmetic number, because the mean of its divisors is an integer number (1183338).

Almost surely, 2^4728991 is an apocalyptic number.

4728991 is a deficient number, since it is larger than the sum of its proper divisors (4361).

4728991 is a wasteful number, since it uses less digits than its factorization.

4728991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4360.

The product of its digits is 36288, while the sum is 40.

The square root of 4728991 is about 2174.6243353738. The cubic root of 4728991 is about 167.8505733875.

The spelling of 4728991 in words is "four million, seven hundred twenty-eight thousand, nine hundred ninety-one".