28315242 has 24 divisors (see below), whose sum is σ = 62778144. Its totient is φ = 9218664.

The previous prime is 28315241. The next prime is 28315247. The reversal of 28315242 is 24251382.

It is not an unprimeable number, because it can be changed into a prime (28315241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17518 + ... + 19065.

It is an arithmetic number, because the mean of its divisors is an integer number (2615756).

Almost surely, 2^28315242 is an apocalyptic number.

28315242 is an abundant number, since it is smaller than the sum of its proper divisors (34462902).

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

28315242 is a wasteful number, since it uses less digits than its factorization.

28315242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36634 (or 36631 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 28315242 is about 5321.2068180066. The cubic root of 28315242 is about 304.7942426631.

The spelling of 28315242 in words is "twenty-eight million, three hundred fifteen thousand, two hundred forty-two".