28145768 has 48 divisors (see below), whose sum is σ = 62439840. Its totient is φ = 11651040.

The previous prime is 28145723. The next prime is 28145791. The reversal of 28145768 is 86754182.

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 11 ways as a sum of consecutive naturals, for example, 53555 + ... + 54077.

It is an arithmetic number, because the mean of its divisors is an integer number (1300830).

Almost surely, 2^28145768 is an apocalyptic number.

28145768 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28145768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31219920).

28145768 is an abundant number, since it is smaller than the sum of its proper divisors (34294072).

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

28145768 is a wasteful number, since it uses less digits than its factorization.

28145768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598 (or 563 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 28145768 is about 5305.2585233898. The cubic root of 28145768 is about 304.1849347965.

The spelling of 28145768 in words is "twenty-eight million, one hundred forty-five thousand, seven hundred sixty-eight".