28082511 has 8 divisors (see below), whose sum is σ = 41603760. Its totient is φ = 18721656.

The previous prime is 28082503. The next prime is 28082543. The reversal of 28082511 is 11528082.

It is not a de Polignac number, because 28082511 - 2³ = 28082503 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1040093 = 28082511 / (2 + 8 + 0 + 8 + 2 + 5 + 1 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28082591) 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, 520020 + ... + 520073.

It is an arithmetic number, because the mean of its divisors is an integer number (5200470).

Almost surely, 2^28082511 is an apocalyptic number.

28082511 is a deficient number, since it is larger than the sum of its proper divisors (13521249).

28082511 is a wasteful number, since it uses less digits than its factorization.

28082511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040102 (or 1040096 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 28082511 is about 5299.2934434696. The cubic root of 28082511 is about 303.9568808591.

The spelling of 28082511 in words is "twenty-eight million, eighty-two thousand, five hundred eleven".