28744936 has 64 divisors (see below), whose sum is σ = 62415360. Its totient is φ = 12288000.

The previous prime is 28744889. The next prime is 28744939. The reversal of 28744936 is 63944782.

It is a junction number, because it is equal to n+sod(n) for n = 28744892 and 28744901.

It is not an unprimeable number, because it can be changed into a prime (28744939) 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, 111720 + ... + 111976.

It is an arithmetic number, because the mean of its divisors is an integer number (975240).

Almost surely, 2^28744936 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 28744936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31207680).

28744936 is an abundant number, since it is smaller than the sum of its proper divisors (33670424).

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

28744936 is a wasteful number, since it uses less digits than its factorization.

28744936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346 (or 342 counting only the distinct ones).

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

The square root of 28744936 is about 5361.4304061510. The cubic root of 28744936 is about 306.3282961826.

The spelling of 28744936 in words is "twenty-eight million, seven hundred forty-four thousand, nine hundred thirty-six".