28788242 has 64 divisors (see below), whose sum is σ = 55883520. Its totient is φ = 10838016.

The previous prime is 28788239. The next prime is 28788247. The reversal of 28788242 is 24288782.

It is a self number, because there is not a number n which added to its sum of digits gives 28788242.

It is not an unprimeable number, because it can be changed into a prime (28788247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 296738 + ... + 296834.

It is an arithmetic number, because the mean of its divisors is an integer number (873180).

Almost surely, 2^28788242 is an apocalyptic number.

28788242 is a deficient number, since it is larger than the sum of its proper divisors (27095278).

28788242 is a wasteful number, since it uses less digits than its factorization.

28788242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195.

The product of its digits is 114688, while the sum is 41.

The square root of 28788242 is about 5365.4675471947. The cubic root of 28788242 is about 306.4820530835.

It can be divided in two parts, 28788 and 242, that multiplied together give a palindrome (6966696).

The spelling of 28788242 in words is "twenty-eight million, seven hundred eighty-eight thousand, two hundred forty-two".