28530768 has 40 divisors (see below), whose sum is σ = 84234688. Its totient is φ = 8151552.

The previous prime is 28530767. The next prime is 28530769. The reversal of 28530768 is 86703582.

It is an interprime number because it is at equal distance from previous prime (28530767) and next prime (28530769).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28530763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42121 + ... + 42792.

Almost surely, 2^28530768 is an apocalyptic number.

28530768 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28530768 is an abundant number, since it is smaller than the sum of its proper divisors (55703920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28530768 is a wasteful number, since it uses less digits than its factorization.

28530768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84931 (or 84925 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 28530768 is about 5341.4200359081. The cubic root of 28530768 is about 305.5656188764.

The spelling of 28530768 in words is "twenty-eight million, five hundred thirty thousand, seven hundred sixty-eight".