28749436 has 12 divisors (see below), whose sum is σ = 50399440. Its totient is φ = 14349600.

The previous prime is 28749421. The next prime is 28749449. The reversal of 28749436 is 63494782.

It is a junction number, because it is equal to n+sod(n) for n = 28749392 and 28749401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3576 + ... + 8383.

Almost surely, 2^28749436 is an apocalyptic number.

It is an amenable number.

28749436 is a deficient number, since it is larger than the sum of its proper divisors (21650004).

28749436 is a wasteful number, since it uses less digits than its factorization.

28749436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12564 (or 12562 counting only the distinct ones).

The product of its digits is 290304, while the sum is 43.

The square root of 28749436 is about 5361.8500538527. The cubic root of 28749436 is about 306.3442805100.

The spelling of 28749436 in words is "twenty-eight million, seven hundred forty-nine thousand, four hundred thirty-six".