28005677 has 32 divisors (see below), whose sum is σ = 35769600. Its totient is φ = 21385728.

The previous prime is 28005667. The next prime is 28005683. The reversal of 28005677 is 77650082.

It is not a de Polignac number, because 28005677 - 2⁴ = 28005661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28005667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 204353 + ... + 204489.

It is an arithmetic number, because the mean of its divisors is an integer number (1117800).

Almost surely, 2^28005677 is an apocalyptic number.

It is an amenable number.

28005677 is a deficient number, since it is larger than the sum of its proper divisors (7763923).

28005677 is a wasteful number, since it uses less digits than its factorization.

28005677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 28005677 is about 5292.0390210202. The cubic root of 28005677 is about 303.6794180812.

It can be divided in two parts, 28005 and 677, that added together give a palindrome (28682).

The spelling of 28005677 in words is "twenty-eight million, five thousand, six hundred seventy-seven".