28107956 has 12 divisors (see below), whose sum is σ = 49520100. Its totient is φ = 13959360.

The previous prime is 28107929. The next prime is 28107971. The reversal of 28107956 is 65970182.

It can be written as a sum of positive squares in 2 ways, for example, as 3763600 + 24344356 = 1940^2 + 4934^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22985 + ... + 24176.

It is an arithmetic number, because the mean of its divisors is an integer number (4126675).

Almost surely, 2^28107956 is an apocalyptic number.

It is an amenable number.

28107956 is a deficient number, since it is larger than the sum of its proper divisors (21412144).

28107956 is a wasteful number, since it uses less digits than its factorization.

28107956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47314 (or 47312 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 28107956 is about 5301.6936916423. The cubic root of 28107956 is about 304.0486562240.

The spelling of 28107956 in words is "twenty-eight million, one hundred seven thousand, nine hundred fifty-six".