28150028 has 24 divisors (see below), whose sum is σ = 52354512. Its totient is φ = 13197824.

The previous prime is 28150027. The next prime is 28150033. The reversal of 28150028 is 82005182.

It is a junction number, because it is equal to n+sod(n) for n = 28149979 and 28150006.

It is not an unprimeable number, because it can be changed into a prime (28150027) 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 7 ways as a sum of consecutive naturals, for example, 23000 + ... + 24192.

It is an arithmetic number, because the mean of its divisors is an integer number (2181438).

Almost surely, 2^28150028 is an apocalyptic number.

It is an amenable number.

28150028 is a deficient number, since it is larger than the sum of its proper divisors (24204484).

28150028 is a wasteful number, since it uses less digits than its factorization.

28150028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561 (or 1559 counting only the distinct ones).

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

The square root of 28150028 is about 5305.6599966451. The cubic root of 28150028 is about 304.2002806495.

The spelling of 28150028 in words is "twenty-eight million, one hundred fifty thousand, twenty-eight".