28196530 has 16 divisors (see below), whose sum is σ = 51712344. Its totient is φ = 11065600.

The previous prime is 28196521. The next prime is 28196537. The reversal of 28196530 is 3569182.

It can be written as a sum of positive squares in 4 ways, for example, as 27112849 + 1083681 = 5207^2 + 1041^2 .

It is not an unprimeable number, because it can be changed into a prime (28196537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26071 + ... + 27130.

Almost surely, 2^28196530 is an apocalyptic number.

28196530 is a deficient number, since it is larger than the sum of its proper divisors (23515814).

28196530 is a wasteful number, since it uses less digits than its factorization.

28196530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53261.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 28196530 is about 5310.0404894878. The cubic root of 28196530 is about 304.3676948017.

The spelling of 28196530 in words is "twenty-eight million, one hundred ninety-six thousand, five hundred thirty".