28611530 has 16 divisors (see below), whose sum is σ = 54211680. Its totient is φ = 10842192.

The previous prime is 28611529. The next prime is 28611551. The reversal of 28611530 is 3511682.

It is a self number, because there is not a number n which added to its sum of digits gives 28611530.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75104 + ... + 75483.

It is an arithmetic number, because the mean of its divisors is an integer number (3388230).

Almost surely, 2^28611530 is an apocalyptic number.

28611530 is a deficient number, since it is larger than the sum of its proper divisors (25600150).

28611530 is a wasteful number, since it uses less digits than its factorization.

28611530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150613.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 28611530 is about 5348.9746681023. The cubic root of 28611530 is about 305.8536686250.

The spelling of 28611530 in words is "twenty-eight million, six hundred eleven thousand, five hundred thirty".