7648221 has 16 divisors (see below), whose sum is σ = 11708928. Its totient is φ = 4350000.

The previous prime is 7648219. The next prime is 7648237. The reversal of 7648221 is 1228467.

It is not a de Polignac number, because 7648221 - 2¹ = 7648219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7648211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4546 + ... + 5996.

It is an arithmetic number, because the mean of its divisors is an integer number (731808).

Almost surely, 2^7648221 is an apocalyptic number.

It is an amenable number.

7648221 is a deficient number, since it is larger than the sum of its proper divisors (4060707).

7648221 is a wasteful number, since it uses less digits than its factorization.

7648221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1712.

The product of its digits is 5376, while the sum is 30.

The square root of 7648221 is about 2765.5417190851. The cubic root of 7648221 is about 197.0244586430.

The spelling of 7648221 in words is "seven million, six hundred forty-eight thousand, two hundred twenty-one".