28633736 has 16 divisors (see below), whose sum is σ = 53784540. Its totient is φ = 14291200.

The previous prime is 28633733. The next prime is 28633751. The reversal of 28633736 is 63733682.

It can be written as a sum of positive squares in 2 ways, for example, as 28622500 + 11236 = 5350^2 + 106^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28633736.

It is not an unprimeable number, because it can be changed into a prime (28633733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2036 + ... + 7836.

Almost surely, 2^28633736 is an apocalyptic number.

It is an amenable number.

28633736 is a deficient number, since it is larger than the sum of its proper divisors (25150804).

28633736 is a wasteful number, since it uses less digits than its factorization.

28633736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6424 (or 6420 counting only the distinct ones).

The product of its digits is 108864, while the sum is 38.

The square root of 28633736 is about 5351.0499904224. The cubic root of 28633736 is about 305.9327746153.

The spelling of 28633736 in words is "twenty-eight million, six hundred thirty-three thousand, seven hundred thirty-six".