28036538 has 16 divisors (see below), whose sum is σ = 43341480. Its totient is φ = 13593600.

The previous prime is 28036529. The next prime is 28036549. The reversal of 28036538 is 83563082.

It can be written as a sum of positive squares in 4 ways, for example, as 7579009 + 20457529 = 2753^2 + 4523^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28036498 and 28036507.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13898 + ... + 15786.

Almost surely, 2^28036538 is an apocalyptic number.

28036538 is a deficient number, since it is larger than the sum of its proper divisors (15304942).

28036538 is a wasteful number, since it uses less digits than its factorization.

28036538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2113.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 28036538 is about 5294.9540130203. The cubic root of 28036538 is about 303.7909241659.

The spelling of 28036538 in words is "twenty-eight million, thirty-six thousand, five hundred thirty-eight".