28266530 has 16 divisors (see below), whose sum is σ = 51096960. Its totient is φ = 11258352.

The previous prime is 28266527. The next prime is 28266533. The reversal of 28266530 is 3566282.

It is an interprime number because it is at equal distance from previous prime (28266527) and next prime (28266533).

It is not an unprimeable number, because it can be changed into a prime (28266533) 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, 3524 + ... + 8303.

It is an arithmetic number, because the mean of its divisors is an integer number (3193560).

Almost surely, 2^28266530 is an apocalyptic number.

28266530 is a deficient number, since it is larger than the sum of its proper divisors (22830430).

28266530 is a wasteful number, since it uses less digits than its factorization.

28266530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12073.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 28266530 is about 5316.6276905572. The cubic root of 28266530 is about 304.6193585334.

The spelling of 28266530 in words is "twenty-eight million, two hundred sixty-six thousand, five hundred thirty".