28286248 has 8 divisors (see below), whose sum is σ = 53036730. Its totient is φ = 14143120.

The previous prime is 28286239. The next prime is 28286287. The reversal of 28286248 is 84268282.

It can be written as a sum of positive squares in only one way, i.e., 20232004 + 8054244 = 4498^2 + 2838^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×28286248² = 1600223651835008, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28286248.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1767883 + ... + 1767898.

Almost surely, 2^28286248 is an apocalyptic number.

It is an amenable number.

28286248 is a deficient number, since it is larger than the sum of its proper divisors (24750482).

28286248 is a wasteful number, since it uses less digits than its factorization.

28286248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3535787 (or 3535783 counting only the distinct ones).

The product of its digits is 98304, while the sum is 40.

The square root of 28286248 is about 5318.4817382407. The cubic root of 28286248 is about 304.6901735974.

The spelling of 28286248 in words is "twenty-eight million, two hundred eighty-six thousand, two hundred forty-eight".