28820768 has 12 divisors (see below), whose sum is σ = 56740950. Its totient is φ = 14410368.

The previous prime is 28820767. The next prime is 28820783. The reversal of 28820768 is 86702882.

It can be written as a sum of positive squares in only one way, i.e., 26091664 + 2729104 = 5108^2 + 1652^2 .

It is not an unprimeable number, because it can be changed into a prime (28820761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450293 + ... + 450356.

Almost surely, 2^28820768 is an apocalyptic number.

It is an amenable number.

28820768 is a deficient number, since it is larger than the sum of its proper divisors (27920182).

28820768 is an equidigital number, since it uses as much as digits as its factorization.

28820768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900659 (or 900651 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 28820768 is about 5368.4977414543. The cubic root of 28820768 is about 306.5974344870.

The spelling of 28820768 in words is "twenty-eight million, eight hundred twenty thousand, seven hundred sixty-eight".