28107236 has 6 divisors (see below), whose sum is σ = 49187670. Its totient is φ = 14053616.

The previous prime is 28107227. The next prime is 28107253. The reversal of 28107236 is 63270182.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 27457600 + 649636 = 5240^2 + 806^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28107199 and 28107208.

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 as a sum of consecutive naturals, namely, 3513401 + ... + 3513408.

It is an arithmetic number, because the mean of its divisors is an integer number (8197945).

Almost surely, 2^28107236 is an apocalyptic number.

It is an amenable number.

28107236 is a deficient number, since it is larger than the sum of its proper divisors (21080434).

28107236 is a wasteful number, since it uses less digits than its factorization.

28107236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7026813 (or 7026811 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 28107236 is about 5301.6257883785. The cubic root of 28107236 is about 304.0460600800.

The spelling of 28107236 in words is "twenty-eight million, one hundred seven thousand, two hundred thirty-six".