28888723 has 4 divisors (see below), whose sum is σ = 29593368. Its totient is φ = 28184080.

The previous prime is 28888681. The next prime is 28888747. The reversal of 28888723 is 32788882.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28888723 - 2²¹ = 26791571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28888753) 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, 352261 + ... + 352342.

It is an arithmetic number, because the mean of its divisors is an integer number (7398342).

Almost surely, 2^28888723 is an apocalyptic number.

28888723 is a deficient number, since it is larger than the sum of its proper divisors (704645).

28888723 is an equidigital number, since it uses as much as digits as its factorization.

28888723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704644.

The product of its digits is 344064, while the sum is 46.

The square root of 28888723 is about 5374.8230668553. The cubic root of 28888723 is about 306.8382154285.

It can be divided in two parts, 2888 and 8723, that added together give a palindrome (11611).

The spelling of 28888723 in words is "twenty-eight million, eight hundred eighty-eight thousand, seven hundred twenty-three".