28744235 has 16 divisors (see below), whose sum is σ = 37388064. Its totient is φ = 21088512.

The previous prime is 28744231. The next prime is 28744259. The reversal of 28744235 is 53244782.

It is a cyclic number.

It is not a de Polignac number, because 28744235 - 2² = 28744231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28744195 and 28744204.

It is not an unprimeable number, because it can be changed into a prime (28744231) 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, 9239 + ... + 11951.

It is an arithmetic number, because the mean of its divisors is an integer number (2336754).

Almost surely, 2^28744235 is an apocalyptic number.

28744235 is a deficient number, since it is larger than the sum of its proper divisors (8643829).

28744235 is a wasteful number, since it uses less digits than its factorization.

28744235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2894.

The product of its digits is 53760, while the sum is 35.

The square root of 28744235 is about 5361.3650314076. The cubic root of 28744235 is about 306.3258060294.

The spelling of 28744235 in words is "twenty-eight million, seven hundred forty-four thousand, two hundred thirty-five".