1228416320 has 28 divisors (see below), whose sum is σ = 2925167124. Its totient is φ = 491366400.

The previous prime is 1228416289. The next prime is 1228416331. The reversal of 1228416320 is 236148221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 886610176 + 341806144 = 29776^2 + 18488^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1919081 + ... + 1919720.

Almost surely, 2^1228416320 is an apocalyptic number.

1228416320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1228416320 is an abundant number, since it is smaller than the sum of its proper divisors (1696750804).

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

1228416320 is an equidigital number, since it uses as much as digits as its factorization.

1228416320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3838818 (or 3838808 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 1228416320 is about 35048.7705918482. The cubic root of 1228416320 is about 1070.9812293452.

The spelling of 1228416320 in words is "one billion, two hundred twenty-eight million, four hundred sixteen thousand, three hundred twenty".