28271944 has 8 divisors (see below), whose sum is σ = 53009910. Its totient is φ = 14135968.

The previous prime is 28271933. The next prime is 28271963. The reversal of 28271944 is 44917282.

It can be written as a sum of positive squares in only one way, i.e., 27144100 + 1127844 = 5210^2 + 1062^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 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 as a sum of consecutive naturals, namely, 1766989 + ... + 1767004.

Almost surely, 2^28271944 is an apocalyptic number.

It is an amenable number.

28271944 is a deficient number, since it is larger than the sum of its proper divisors (24737966).

28271944 is a wasteful number, since it uses less digits than its factorization.

28271944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3533999 (or 3533995 counting only the distinct ones).

The product of its digits is 32256, while the sum is 37.

The square root of 28271944 is about 5317.1368235170. The cubic root of 28271944 is about 304.6388056076.

The spelling of 28271944 in words is "twenty-eight million, two hundred seventy-one thousand, nine hundred forty-four".