28677505 has 8 divisors (see below), whose sum is σ = 35062632. Its totient is φ = 22508928.

The previous prime is 28677499. The next prime is 28677529. The reversal of 28677505 is 50577682.

It can be written as a sum of positive squares in 4 ways, for example, as 1803649 + 26873856 = 1343^2 + 5184^2 .

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 28677505 - 2³ = 28677497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53844 + ... + 54373.

It is an arithmetic number, because the mean of its divisors is an integer number (4382829).

Almost surely, 2^28677505 is an apocalyptic number.

It is an amenable number.

28677505 is a deficient number, since it is larger than the sum of its proper divisors (6385127).

28677505 is a wasteful number, since it uses less digits than its factorization.

28677505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108275.

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 28677505 is about 5355.1381868258. The cubic root of 28677505 is about 306.0885763200.

The spelling of 28677505 in words is "twenty-eight million, six hundred seventy-seven thousand, five hundred five".