28321968 has 20 divisors (see below), whose sum is σ = 73165208. Its totient is φ = 9440640.

The previous prime is 28321967. The next prime is 28321973. The reversal of 28321968 is 86912382.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28321967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294973 + ... + 295068.

Almost surely, 2^28321968 is an apocalyptic number.

It is an amenable number.

28321968 is an abundant number, since it is smaller than the sum of its proper divisors (44843240).

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

28321968 is a wasteful number, since it uses less digits than its factorization.

28321968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590052 (or 590046 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 28321968 is about 5321.8387799707. The cubic root of 28321968 is about 304.8183743513.

The spelling of 28321968 in words is "twenty-eight million, three hundred twenty-one thousand, nine hundred sixty-eight".