28605522 has 32 divisors (see below), whose sum is σ = 62818560. Its totient is φ = 8611920.

The previous prime is 28605517. The next prime is 28605527. The reversal of 28605522 is 22550682.

It is an interprime number because it is at equal distance from previous prime (28605517) and next prime (28605527).

It is a self number, because there is not a number n which added to its sum of digits gives 28605522.

It is not an unprimeable number, because it can be changed into a prime (28605527) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 9429 + ... + 12087.

It is an arithmetic number, because the mean of its divisors is an integer number (1963080).

Almost surely, 2^28605522 is an apocalyptic number.

28605522 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28605522 is an abundant number, since it is smaller than the sum of its proper divisors (34213038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28605522 is a wasteful number, since it uses less digits than its factorization.

28605522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2838.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 28605522 is about 5348.4130356583. The cubic root of 28605522 is about 305.8322588708.

It can be divided in two parts, 28 and 605522, that added together give a triangular number (605550 = T₁₁₀₀).

The spelling of 28605522 in words is "twenty-eight million, six hundred five thousand, five hundred twenty-two".