28755513 has 8 divisors (see below), whose sum is σ = 42600800. Its totient is φ = 19170324.

The previous prime is 28755511. The next prime is 28755527. The reversal of 28755513 is 31555782.

It is not a de Polignac number, because 28755513 - 2¹ = 28755511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28755511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 532483 + ... + 532536.

It is an arithmetic number, because the mean of its divisors is an integer number (5325100).

Almost surely, 2^28755513 is an apocalyptic number.

It is an amenable number.

28755513 is a deficient number, since it is larger than the sum of its proper divisors (13845287).

28755513 is a wasteful number, since it uses less digits than its factorization.

28755513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065028 (or 1065022 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 28755513 is about 5362.4167126399. The cubic root of 28755513 is about 306.3658638092.

The spelling of 28755513 in words is "twenty-eight million, seven hundred fifty-five thousand, five hundred thirteen".