28877633 has 4 divisors (see below), whose sum is σ = 29422548. Its totient is φ = 28332720.

The previous prime is 28877593. The next prime is 28877657. The reversal of 28877633 is 33677882.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9314704 + 19562929 = 3052^2 + 4423^2 .

It is a cyclic number.

It is not a de Polignac number, because 28877633 - 2⁸ = 28877377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28867633) 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 3 ways as a sum of consecutive naturals, for example, 272378 + ... + 272483.

It is an arithmetic number, because the mean of its divisors is an integer number (7355637).

Almost surely, 2^28877633 is an apocalyptic number.

It is an amenable number.

28877633 is a deficient number, since it is larger than the sum of its proper divisors (544915).

28877633 is an equidigital number, since it uses as much as digits as its factorization.

28877633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544914.

The product of its digits is 338688, while the sum is 44.

The square root of 28877633 is about 5373.7913059590. The cubic root of 28877633 is about 306.7989466876.

The spelling of 28877633 in words is "twenty-eight million, eight hundred seventy-seven thousand, six hundred thirty-three".