28840896 has 168 divisors, whose sum is σ = 98901504. Its totient is φ = 7856640.

The previous prime is 28840883. The next prime is 28840897. The reversal of 28840896 is 69804882.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (168).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28840897) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 92581 + ... + 92891.

Almost surely, 2^28840896 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 28840896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49450752).

28840896 is an abundant number, since it is smaller than the sum of its proper divisors (70060608).

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

28840896 is a wasteful number, since it uses less digits than its factorization.

28840896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359 (or 346 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 28840896 is about 5370.3720541504. The cubic root of 28840896 is about 306.6687922558.

The spelling of 28840896 in words is "twenty-eight million, eight hundred forty thousand, eight hundred ninety-six".