28019616 has 48 divisors (see below), whose sum is σ = 74952864. Its totient is φ = 9161984.

The previous prime is 28019611. The next prime is 28019639. The reversal of 28019616 is 61691082.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (28019611) 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, 2335 + ... + 7841.

It is an arithmetic number, because the mean of its divisors is an integer number (1561518).

Almost surely, 2^28019616 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 28019616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37476432).

28019616 is an abundant number, since it is smaller than the sum of its proper divisors (46933248).

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

28019616 is a wasteful number, since it uses less digits than its factorization.

28019616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5573 (or 5565 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 28019616 is about 5293.3558353846. The cubic root of 28019616 is about 303.7297922169.

The spelling of 28019616 in words is "twenty-eight million, nineteen thousand, six hundred sixteen".