28053138 has 8 divisors (see below), whose sum is σ = 56106288. Its totient is φ = 9351044.

The previous prime is 28053131. The next prime is 28053167. The reversal of 28053138 is 83135082.

It is a happy number.

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

28053138 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (28053131) 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 3 ways as a sum of consecutive naturals, for example, 2337756 + ... + 2337767.

It is an arithmetic number, because the mean of its divisors is an integer number (7013286).

Almost surely, 2^28053138 is an apocalyptic number.

28053138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28053138 is a wasteful number, since it uses less digits than its factorization.

28053138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4675528.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 28053138 is about 5296.5213112004. The cubic root of 28053138 is about 303.8508689707.

The spelling of 28053138 in words is "twenty-eight million, fifty-three thousand, one hundred thirty-eight".