15220648 has 24 divisors (see below), whose sum is σ = 28986750. Its totient is φ = 7492352.

The previous prime is 15220637. The next prime is 15220663. The reversal of 15220648 is 84602251.

It can be written as a sum of positive squares in 3 ways, for example, as 1397124 + 13823524 = 1182^2 + 3718^2 .

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 in 5 ways as a sum of consecutive naturals, for example, 102078 + ... + 102226.

Almost surely, 2^15220648 is an apocalyptic number.

It is an amenable number.

15220648 is a deficient number, since it is larger than the sum of its proper divisors (13766102).

15220648 is a wasteful number, since it uses less digits than its factorization.

15220648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 15220648 is about 3901.3648893688. The cubic root of 15220648 is about 247.8245811177.

Adding to 15220648 its reverse (84602251), we get a palindrome (99822899).

The spelling of 15220648 in words is "fifteen million, two hundred twenty thousand, six hundred forty-eight".