28998723 has 16 divisors (see below), whose sum is σ = 42049280. Its totient is φ = 17669664.

The previous prime is 28998721. The next prime is 28998737. The reversal of 28998723 is 32789982.

It is a happy number.

It is not a de Polignac number, because 28998723 - 2¹ = 28998721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28998721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 408 + ... + 7626.

It is an arithmetic number, because the mean of its divisors is an integer number (2628080).

Almost surely, 2^28998723 is an apocalyptic number.

28998723 is a deficient number, since it is larger than the sum of its proper divisors (13050557).

28998723 is a wasteful number, since it uses less digits than its factorization.

28998723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7338.

The product of its digits is 435456, while the sum is 48.

The square root of 28998723 is about 5385.0462393558. The cubic root of 28998723 is about 307.2271729063.

The spelling of 28998723 in words is "twenty-eight million, nine hundred ninety-eight thousand, seven hundred twenty-three".