28863736 has 64 divisors (see below), whose sum is σ = 63388800. Its totient is φ = 12182400.

The previous prime is 28863733. The next prime is 28863743. The reversal of 28863736 is 63736882.

It is a junction number, because it is equal to n+sod(n) for n = 28863692 and 28863701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28863733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101851 + ... + 102133.

It is an arithmetic number, because the mean of its divisors is an integer number (990450).

Almost surely, 2^28863736 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 28863736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31694400).

28863736 is an abundant number, since it is smaller than the sum of its proper divisors (34525064).

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

28863736 is a wasteful number, since it uses less digits than its factorization.

28863736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380 (or 376 counting only the distinct ones).

The product of its digits is 290304, while the sum is 43.

The square root of 28863736 is about 5372.4981154022. The cubic root of 28863736 is about 306.7497244045.

The spelling of 28863736 in words is "twenty-eight million, eight hundred sixty-three thousand, seven hundred thirty-six".