28723016 has 48 divisors (see below), whose sum is σ = 64022400. Its totient is φ = 12040224.

The previous prime is 28723007. The next prime is 28723031. The reversal of 28723016 is 61032782.

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 28723016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17645 + ... + 19203.

It is an arithmetic number, because the mean of its divisors is an integer number (1333800).

Almost surely, 2^28723016 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 28723016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32011200).

28723016 is an abundant number, since it is smaller than the sum of its proper divisors (35299384).

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

28723016 is a wasteful number, since it uses less digits than its factorization.

28723016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626 (or 1615 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 28723016 is about 5359.3857857034. The cubic root of 28723016 is about 306.2504108838.

Adding to 28723016 its reverse (61032782), we get a palindrome (89755798).

The spelling of 28723016 in words is "twenty-eight million, seven hundred twenty-three thousand, sixteen".