28890336 has 96 divisors (see below), whose sum is σ = 81768960. Its totient is φ = 8902656.

The previous prime is 28890311. The next prime is 28890349. The reversal of 28890336 is 63309882.

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28890294 and 28890303.

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, 85560 + ... + 85896.

It is an arithmetic number, because the mean of its divisors is an integer number (851760).

Almost surely, 2^28890336 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 28890336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40884480).

28890336 is an abundant number, since it is smaller than the sum of its proper divisors (52878624).

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

28890336 is a wasteful number, since it uses less digits than its factorization.

28890336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 408 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 28890336 is about 5374.9731162118. The cubic root of 28890336 is about 306.8439260862.

The spelling of 28890336 in words is "twenty-eight million, eight hundred ninety thousand, three hundred thirty-six".