28113536 has 64 divisors (see below), whose sum is σ = 62717760. Its totient is φ = 12441600.

The previous prime is 28113523. The next prime is 28113539. The reversal of 28113536 is 63531182.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 28113499 and 28113508.

It is not an unprimeable number, because it can be changed into a prime (28113539) 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, 57485 + ... + 57971.

It is an arithmetic number, because the mean of its divisors is an integer number (979965).

Almost surely, 2^28113536 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 28113536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31358880).

28113536 is an abundant number, since it is smaller than the sum of its proper divisors (34604224).

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

28113536 is a wasteful number, since it uses less digits than its factorization.

28113536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553 (or 541 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 28113536 is about 5302.2199124518. The cubic root of 28113536 is about 304.0687748367.

The spelling of 28113536 in words is "twenty-eight million, one hundred thirteen thousand, five hundred thirty-six".