28049677 has 4 divisors (see below), whose sum is σ = 29699676. Its totient is φ = 26399680.

The previous prime is 28049653. The next prime is 28049683. The reversal of 28049677 is 77694082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15792676 + 12257001 = 3974^2 + 3501^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28049677 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 (28049477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 824974 + ... + 825007.

It is an arithmetic number, because the mean of its divisors is an integer number (7424919).

Almost surely, 2^28049677 is an apocalyptic number.

It is an amenable number.

28049677 is a deficient number, since it is larger than the sum of its proper divisors (1649999).

28049677 is a wasteful number, since it uses less digits than its factorization.

28049677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649998.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 28049677 is about 5296.1945772413. The cubic root of 28049677 is about 303.8383727916.

The spelling of 28049677 in words is "twenty-eight million, forty-nine thousand, six hundred seventy-seven".