28992768 has 72 divisors (see below), whose sum is σ = 88202688. Its totient is φ = 8282112.

The previous prime is 28992767. The next prime is 28992787. The reversal of 28992768 is 86729982.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28992768.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28992767) 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, 2680 + ... + 8072.

Almost surely, 2^28992768 is an apocalyptic number.

28992768 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28992768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44101344).

28992768 is an abundant number, since it is smaller than the sum of its proper divisors (59209920).

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

28992768 is an equidigital number, since it uses as much as digits as its factorization.

28992768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5419 (or 5405 counting only the distinct ones).

The product of its digits is 870912, while the sum is 51.

The square root of 28992768 is about 5384.4932909235. The cubic root of 28992768 is about 307.2061413703.

The spelling of 28992768 in words is "twenty-eight million, nine hundred ninety-two thousand, seven hundred sixty-eight".