28018052 has 6 divisors (see below), whose sum is σ = 49031598. Its totient is φ = 14009024.

The previous prime is 28018043. The next prime is 28018073. The reversal of 28018052 is 25081082.

It can be written as a sum of positive squares in only one way, i.e., 27730756 + 287296 = 5266^2 + 536^2 .

It is a super-2 number, since 2×28018052² = 1570022475749408, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3502253 + ... + 3502260.

It is an arithmetic number, because the mean of its divisors is an integer number (8171933).

Almost surely, 2^28018052 is an apocalyptic number.

It is an amenable number.

28018052 is a deficient number, since it is larger than the sum of its proper divisors (21013546).

28018052 is a wasteful number, since it uses less digits than its factorization.

28018052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7004517 (or 7004515 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 28018052 is about 5293.2081009535. The cubic root of 28018052 is about 303.7241409114.

The spelling of 28018052 in words is "twenty-eight million, eighteen thousand, fifty-two".