28965768 has 64 divisors (see below), whose sum is σ = 78503040. Its totient is φ = 8853504.

The previous prime is 28965767. The next prime is 28965791. The reversal of 28965768 is 86756982.

It is a self number, because there is not a number n which added to its sum of digits gives 28965768.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28965767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81880 + ... + 82232.

It is an arithmetic number, because the mean of its divisors is an integer number (1226610).

Almost surely, 2^28965768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28965768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39251520).

28965768 is an abundant number, since it is smaller than the sum of its proper divisors (49537272).

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

28965768 is a wasteful number, since it uses less digits than its factorization.

28965768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638 (or 634 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 51.

The square root of 28965768 is about 5381.9855072269. The cubic root of 28965768 is about 307.1107481333.

The spelling of 28965768 in words is "twenty-eight million, nine hundred sixty-five thousand, seven hundred sixty-eight".