28636450 has 48 divisors (see below), whose sum is σ = 55699560. Its totient is φ = 10944000.

The previous prime is 28636441. The next prime is 28636451. The reversal of 28636450 is 5463682.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 152881 + 28483569 = 391^2 + 5337^2 .

It is not an unprimeable number, because it can be changed into a prime (28636451) 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 23 ways as a sum of consecutive naturals, for example, 124936 + ... + 125164.

Almost surely, 2^28636450 is an apocalyptic number.

28636450 is a deficient number, since it is larger than the sum of its proper divisors (27063110).

28636450 is a wasteful number, since it uses less digits than its factorization.

28636450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 28636450 is about 5351.3035795028. The cubic root of 28636450 is about 305.9424400826.

The spelling of 28636450 in words is "twenty-eight million, six hundred thirty-six thousand, four hundred fifty".