28980644 has 48 divisors (see below), whose sum is σ = 65995776. Its totient is φ = 10797600.

The previous prime is 28980641. The next prime is 28980647. The reversal of 28980644 is 44608982.

It is an interprime number because it is at equal distance from previous prime (28980641) and next prime (28980647).

It is not an unprimeable number, because it can be changed into a prime (28980641) by changing a digit.

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, 5039 + ... + 9129.

It is an arithmetic number, because the mean of its divisors is an integer number (1374912).

Almost surely, 2^28980644 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 28980644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32997888).

28980644 is an abundant number, since it is smaller than the sum of its proper divisors (37015132).

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

28980644 is a wasteful number, since it uses less digits than its factorization.

28980644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4136 (or 4134 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 28980644 is about 5383.3673476738. The cubic root of 28980644 is about 307.1633136031.

The spelling of 28980644 in words is "twenty-eight million, nine hundred eighty thousand, six hundred forty-four".