28677685 has 8 divisors (see below), whose sum is σ = 34885080. Its totient is φ = 22627584.

The previous prime is 28677683. The next prime is 28677709. The reversal of 28677685 is 58677682.

It can be written as a sum of positive squares in 4 ways, for example, as 11957764 + 16719921 = 3458^2 + 4089^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28677685 - 2¹ = 28677683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28677683) 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, 38920 + ... + 39649.

It is an arithmetic number, because the mean of its divisors is an integer number (4360635).

Almost surely, 2^28677685 is an apocalyptic number.

It is an amenable number.

28677685 is a deficient number, since it is larger than the sum of its proper divisors (6207395).

28677685 is an equidigital number, since it uses as much as digits as its factorization.

28677685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78647.

The product of its digits is 1128960, while the sum is 49.

The square root of 28677685 is about 5355.1549930884. The cubic root of 28677685 is about 306.0892167270.

The spelling of 28677685 in words is "twenty-eight million, six hundred seventy-seven thousand, six hundred eighty-five".