28772068 has 12 divisors (see below), whose sum is σ = 54224380. Its totient is φ = 13279392.

The previous prime is 28772063. The next prime is 28772069. The reversal of 28772068 is 86027782.

It can be written as a sum of positive squares in 2 ways, for example, as 2985984 + 25786084 = 1728^2 + 5078^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28772068.

It is not an unprimeable number, because it can be changed into a prime (28772063) by changing a digit.

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, 276603 + ... + 276706.

Almost surely, 2^28772068 is an apocalyptic number.

It is an amenable number.

28772068 is a deficient number, since it is larger than the sum of its proper divisors (25452312).

28772068 is a wasteful number, since it uses less digits than its factorization.

28772068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553326 (or 553324 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 28772068 is about 5363.9601042513. The cubic root of 28772068 is about 306.4246457416.

The spelling of 28772068 in words is "twenty-eight million, seven hundred seventy-two thousand, sixty-eight".