28081827 has 12 divisors (see below), whose sum is σ = 42326544. Its totient is φ = 17907120.

The previous prime is 28081819. The next prime is 28081847. The reversal of 28081827 is 72818082.

It is not a de Polignac number, because 28081827 - 2³ = 28081819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28081791 and 28081800.

It is not an unprimeable number, because it can be changed into a prime (28081847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67624 + ... + 68037.

It is an arithmetic number, because the mean of its divisors is an integer number (3527212).

Almost surely, 2^28081827 is an apocalyptic number.

28081827 is a deficient number, since it is larger than the sum of its proper divisors (14244717).

28081827 is a wasteful number, since it uses less digits than its factorization.

28081827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135690 (or 135687 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 28081827 is about 5299.2289061712. The cubic root of 28081827 is about 303.9544130338.

The spelling of 28081827 in words is "twenty-eight million, eighty-one thousand, eight hundred twenty-seven".