28320677 has 12 divisors (see below), whose sum is σ = 35940096. Its totient is φ = 22067640.

The previous prime is 28320671. The next prime is 28320683. The reversal of 28320677 is 77602382.

It is an interprime number because it is at equal distance from previous prime (28320671) and next prime (28320683).

It is not a de Polignac number, because 28320677 - 2⁴ = 28320661 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28320671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25733 + ... + 26810.

It is an arithmetic number, because the mean of its divisors is an integer number (2995008).

Almost surely, 2^28320677 is an apocalyptic number.

It is an amenable number.

28320677 is a deficient number, since it is larger than the sum of its proper divisors (7619419).

28320677 is a wasteful number, since it uses less digits than its factorization.

28320677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52568 (or 52561 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 28320677 is about 5321.7174859250. The cubic root of 28320677 is about 304.8137427699.

The spelling of 28320677 in words is "twenty-eight million, three hundred twenty thousand, six hundred seventy-seven".