28768344 has 32 divisors (see below), whose sum is σ = 78459840. Its totient is φ = 8717600.

The previous prime is 28768307. The next prime is 28768349. The reversal of 28768344 is 44386782.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 28768296 and 28768305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28768349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54222 + ... + 54749.

It is an arithmetic number, because the mean of its divisors is an integer number (2451870).

Almost surely, 2^28768344 is an apocalyptic number.

28768344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28768344 is an abundant number, since it is smaller than the sum of its proper divisors (49691496).

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

28768344 is a wasteful number, since it uses less digits than its factorization.

28768344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108991 (or 108987 counting only the distinct ones).

The product of its digits is 258048, while the sum is 42.

The square root of 28768344 is about 5363.6129614281. The cubic root of 28768344 is about 306.4114248797.

The spelling of 28768344 in words is "twenty-eight million, seven hundred sixty-eight thousand, three hundred forty-four".