28813242 has 16 divisors (see below), whose sum is σ = 59032512. Its totient is φ = 9370080.

The previous prime is 28813241. The next prime is 28813261. The reversal of 28813242 is 24231882.

It is not an unprimeable number, because it can be changed into a prime (28813241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58318 + ... + 58809.

It is an arithmetic number, because the mean of its divisors is an integer number (3689532).

Almost surely, 2^28813242 is an apocalyptic number.

28813242 is an abundant number, since it is smaller than the sum of its proper divisors (30219270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28813242 is a wasteful number, since it uses less digits than its factorization.

28813242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117173.

The product of its digits is 6144, while the sum is 30.

The square root of 28813242 is about 5367.7967547216. The cubic root of 28813242 is about 306.5707447846.

It can be divided in two parts, 288 and 13242, that added together give a triangular number (13530 = T₁₆₄).

The spelling of 28813242 in words is "twenty-eight million, eight hundred thirteen thousand, two hundred forty-two".