7216928 has 12 divisors (see below), whose sum is σ = 14208390. Its totient is φ = 3608448.

The previous prime is 7216927. The next prime is 7216931. The reversal of 7216928 is 8296127.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6822544 + 394384 = 2612^2 + 628^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (7216927) by changing a digit.

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, 112733 + ... + 112796.

Almost surely, 2^7216928 is an apocalyptic number.

It is an amenable number.

7216928 is a deficient number, since it is larger than the sum of its proper divisors (6991462).

7216928 is a wasteful number, since it uses less digits than its factorization.

7216928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225539 (or 225531 counting only the distinct ones).

The product of its digits is 12096, while the sum is 35.

The square root of 7216928 is about 2686.4340676815. The cubic root of 7216928 is about 193.2490899980.

It can be divided in two parts, 72 and 16928, that multiplied together give a square (1218816 = 1104²).

The spelling of 7216928 in words is "seven million, two hundred sixteen thousand, nine hundred twenty-eight".