28864344 has 32 divisors (see below), whose sum is σ = 75960000. Its totient is φ = 9114912.

The previous prime is 28864343. The next prime is 28864349. The reversal of 28864344 is 44346882.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28864343) 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, 31194 + ... + 32105.

It is an arithmetic number, because the mean of its divisors is an integer number (2373750).

Almost surely, 2^28864344 is an apocalyptic number.

28864344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28864344 is an abundant number, since it is smaller than the sum of its proper divisors (47095656).

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

28864344 is a wasteful number, since it uses less digits than its factorization.

28864344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63327 (or 63323 counting only the distinct ones).

The product of its digits is 147456, while the sum is 39.

The square root of 28864344 is about 5372.5546995819. The cubic root of 28864344 is about 306.7518782320.

The spelling of 28864344 in words is "twenty-eight million, eight hundred sixty-four thousand, three hundred forty-four".