28551936 has 144 divisors (see below), whose sum is σ = 89478144. Its totient is φ = 7913472.

The previous prime is 28551911. The next prime is 28551937. The reversal of 28551936 is 63915582.

It is a junction number, because it is equal to n+sod(n) for n = 28551894 and 28551903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28551937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252616 + ... + 252728.

It is an arithmetic number, because the mean of its divisors is an integer number (621376).

Almost surely, 2^28551936 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 28551936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44739072).

28551936 is an abundant number, since it is smaller than the sum of its proper divisors (60926208).

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

28551936 is a wasteful number, since it uses less digits than its factorization.

28551936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 172 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 28551936 is about 5343.4011640527. The cubic root of 28551936 is about 305.6411702252.

The spelling of 28551936 in words is "twenty-eight million, five hundred fifty-one thousand, nine hundred thirty-six".