28515436 has 12 divisors (see below), whose sum is σ = 49956480. Its totient is φ = 14242160.

The previous prime is 28515427. The next prime is 28515449. The reversal of 28515436 is 63451582.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 885 + ... + 7603.

It is an arithmetic number, because the mean of its divisors is an integer number (4163040).

Almost surely, 2^28515436 is an apocalyptic number.

It is an amenable number.

28515436 is a deficient number, since it is larger than the sum of its proper divisors (21441044).

28515436 is a wasteful number, since it uses less digits than its factorization.

28515436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7784 (or 7782 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 28515436 is about 5339.9846441727. The cubic root of 28515436 is about 305.5108736329.

The spelling of 28515436 in words is "twenty-eight million, five hundred fifteen thousand, four hundred thirty-six".