28997268 has 48 divisors (see below), whose sum is σ = 72072000. Its totient is φ = 9047808.

The previous prime is 28997239. The next prime is 28997299. The reversal of 28997268 is 86279982.

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 28997268.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19578 + ... + 21006.

It is an arithmetic number, because the mean of its divisors is an integer number (1501500).

Almost surely, 2^28997268 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 28997268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36036000).

28997268 is an abundant number, since it is smaller than the sum of its proper divisors (43074732).

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

28997268 is a wasteful number, since it uses less digits than its factorization.

28997268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544 (or 1542 counting only the distinct ones).

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

The square root of 28997268 is about 5384.9111413281. The cubic root of 28997268 is about 307.2220344845. Note that the first 3 decimals are identical.

The spelling of 28997268 in words is "twenty-eight million, nine hundred ninety-seven thousand, two hundred sixty-eight".