16222784 has 14 divisors (see below), whose sum is σ = 32192214. Its totient is φ = 8111360.

The previous prime is 16222771. The next prime is 16222807. The reversal of 16222784 is 48722261.

It can be written as a sum of positive squares in only one way, i.e., 16000000 + 222784 = 4000^2 + 472^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 16222784.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126677 + ... + 126804.

Almost surely, 2^16222784 is an apocalyptic number.

It is an amenable number.

16222784 is a deficient number, since it is larger than the sum of its proper divisors (15969430).

16222784 is an equidigital number, since it uses as much as digits as its factorization.

16222784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253493 (or 253483 counting only the distinct ones).

The product of its digits is 10752, while the sum is 32.

The square root of 16222784 is about 4027.7517301840. The cubic root of 16222784 is about 253.1483660592.

It can be divided in two parts, 16 and 222784, that multiplied together give a square (3564544 = 1888²).

The spelling of 16222784 in words is "sixteen million, two hundred twenty-two thousand, seven hundred eighty-four".