28823739 has 8 divisors (see below), whose sum is σ = 43921920. Its totient is φ = 16470696.

The previous prime is 28823719. The next prime is 28823747. The reversal of 28823739 is 93732882.

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

It is not a de Polignac number, because 28823739 - 2⁷ = 28823611 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 28823739.

It is not an unprimeable number, because it can be changed into a prime (28823719) 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, 686259 + ... + 686300.

It is an arithmetic number, because the mean of its divisors is an integer number (5490240).

Almost surely, 2^28823739 is an apocalyptic number.

28823739 is a deficient number, since it is larger than the sum of its proper divisors (15098181).

28823739 is a wasteful number, since it uses less digits than its factorization.

28823739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1372569.

The product of its digits is 145152, while the sum is 42.

The square root of 28823739 is about 5368.7744411551. The cubic root of 28823739 is about 306.6079693634.

The spelling of 28823739 in words is "twenty-eight million, eight hundred twenty-three thousand, seven hundred thirty-nine".