28650444 has 12 divisors (see below), whose sum is σ = 66851064. Its totient is φ = 9550144.

The previous prime is 28650443. The next prime is 28650449. The reversal of 28650444 is 44405682.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (28650443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1193757 + ... + 1193780.

It is an arithmetic number, because the mean of its divisors is an integer number (5570922).

Almost surely, 2^28650444 is an apocalyptic number.

It is an amenable number.

28650444 is an abundant number, since it is smaller than the sum of its proper divisors (38200620).

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

28650444 is a wasteful number, since it uses less digits than its factorization.

28650444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2387544 (or 2387542 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 33.

The square root of 28650444 is about 5352.6109516758. The cubic root of 28650444 is about 305.9922677358.

The spelling of 28650444 in words is "twenty-eight million, six hundred fifty thousand, four hundred forty-four".