7220008 has 8 divisors (see below), whose sum is σ = 13537530. Its totient is φ = 3610000.

The previous prime is 7219997. The next prime is 7220027. The reversal of 7220008 is 8000227.

It can be written as a sum of positive squares in only one way, i.e., 3617604 + 3602404 = 1902^2 + 1898^2 .

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 (19) 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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 451243 + ... + 451258.

Almost surely, 2^7220008 is an apocalyptic number.

It is an amenable number.

7220008 is a deficient number, since it is larger than the sum of its proper divisors (6317522).

7220008 is a wasteful number, since it uses less digits than its factorization.

7220008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902507 (or 902503 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 7220008 is about 2687.0072571543. The cubic root of 7220008 is about 193.2765773419.

The spelling of 7220008 in words is "seven million, two hundred twenty thousand, eight".