28265644 has 24 divisors (see below), whose sum is σ = 54104400. Its totient is φ = 12814080.

The previous prime is 28265641. The next prime is 28265681. The reversal of 28265644 is 44656282.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28265641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24472 + ... + 25600.

It is an arithmetic number, because the mean of its divisors is an integer number (2254350).

Almost surely, 2^28265644 is an apocalyptic number.

It is an amenable number.

28265644 is a deficient number, since it is larger than the sum of its proper divisors (25838756).

28265644 is a wasteful number, since it uses less digits than its factorization.

28265644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713 (or 1711 counting only the distinct ones).

The product of its digits is 92160, while the sum is 37.

The square root of 28265644 is about 5316.5443664094. The cubic root of 28265644 is about 304.6161757872.

The spelling of 28265644 in words is "twenty-eight million, two hundred sixty-five thousand, six hundred forty-four".