28788418 has 8 divisors (see below), whose sum is σ = 43387920. Its totient is φ = 14325780.

The previous prime is 28788413. The next prime is 28788421. The reversal of 28788418 is 81488782.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (28788413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33688 + ... + 34531.

It is an arithmetic number, because the mean of its divisors is an integer number (5423490).

Almost surely, 2^28788418 is an apocalyptic number.

28788418 is a deficient number, since it is larger than the sum of its proper divisors (14599502).

28788418 is a wasteful number, since it uses less digits than its factorization.

28788418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68432.

The product of its digits is 229376, while the sum is 46.

The square root of 28788418 is about 5365.4839483499. The cubic root of 28788418 is about 306.4826776525.

The spelling of 28788418 in words is "twenty-eight million, seven hundred eighty-eight thousand, four hundred eighteen".