28488936 has 64 divisors (see below), whose sum is σ = 82644480. Its totient is φ = 8015040.

The previous prime is 28488913. The next prime is 28488953. The reversal of 28488936 is 63988482.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9991 + ... + 12521.

It is an arithmetic number, because the mean of its divisors is an integer number (1291320).

Almost surely, 2^28488936 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 28488936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41322240).

28488936 is an abundant number, since it is smaller than the sum of its proper divisors (54155544).

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

28488936 is a wasteful number, since it uses less digits than its factorization.

28488936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2614 (or 2610 counting only the distinct ones).

The product of its digits is 663552, while the sum is 48.

The square root of 28488936 is about 5337.5027868845. The cubic root of 28488936 is about 305.4162050543.

The spelling of 28488936 in words is "twenty-eight million, four hundred eighty-eight thousand, nine hundred thirty-six".