8728444 has 12 divisors (see below), whose sum is σ = 15334704. Its totient is φ = 4347104.

The previous prime is 8728427. The next prime is 8728457. The reversal of 8728444 is 4448278.

It is a super-2 number, since 2×8728444² = 152371469322272, which contains 22 as substring.

It is an Ulam number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 3097 + ... + 5200.

It is an arithmetic number, because the mean of its divisors is an integer number (1277892).

Almost surely, 2^8728444 is an apocalyptic number.

It is an amenable number.

8728444 is a deficient number, since it is larger than the sum of its proper divisors (6606260).

8728444 is a wasteful number, since it uses less digits than its factorization.

8728444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8564 (or 8562 counting only the distinct ones).

The product of its digits is 57344, while the sum is 37.

The square root of 8728444 is about 2954.3940156993. The cubic root of 8728444 is about 205.8949097936.

It can be divided in two parts, 872 and 8444, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 8728444 in words is "eight million, seven hundred twenty-eight thousand, four hundred forty-four".