1228563520 has 28 divisors (see below), whose sum is σ = 2925517644. Its totient is φ = 491425280.

The previous prime is 1228563509. The next prime is 1228563527. The reversal of 1228563520 is 253658221.

It can be written as a sum of positive squares in 2 ways, for example, as 125260864 + 1103302656 = 11192^2 + 33216^2 .

It is not an unprimeable number, because it can be changed into a prime (1228563527) 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 in 3 ways as a sum of consecutive naturals, for example, 1919311 + ... + 1919950.

It is an arithmetic number, because the mean of its divisors is an integer number (104482773).

Almost surely, 2^1228563520 is an apocalyptic number.

1228563520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1228563520 is an abundant number, since it is smaller than the sum of its proper divisors (1696954124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1228563520 is an equidigital number, since it uses as much as digits as its factorization.

1228563520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3839278 (or 3839268 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 1228563520 is about 35050.8704599472. The cubic root of 1228563520 is about 1071.0240058691.

The spelling of 1228563520 in words is "one billion, two hundred twenty-eight million, five hundred sixty-three thousand, five hundred twenty".