28150281 has 16 divisors (see below), whose sum is σ = 41849920. Its totient is φ = 18701280.

The previous prime is 28150277. The next prime is 28150327. The reversal of 28150281 is 18205182.

28150281 is a `hidden beast` number, since 2 + 81 + 502 + 81 = 666.

It is not a de Polignac number, because 28150281 - 2² = 28150277 is a prime.

It is a super-2 number, since 2×28150281² = 1584876640757922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28150211) 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 15 ways as a sum of consecutive naturals, for example, 6786 + ... + 10116.

It is an arithmetic number, because the mean of its divisors is an integer number (2615620).

Almost surely, 2^28150281 is an apocalyptic number.

It is an amenable number.

28150281 is a deficient number, since it is larger than the sum of its proper divisors (13699639).

28150281 is a wasteful number, since it uses less digits than its factorization.

28150281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3653 (or 3647 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 28150281 is about 5305.6838390541. The cubic root of 28150281 is about 304.2011919860.

The spelling of 28150281 in words is "twenty-eight million, one hundred fifty thousand, two hundred eighty-one".