1228321760 has 24 divisors (see below), whose sum is σ = 2901910536. Its totient is φ = 491328640.

The previous prime is 1228321753. The next prime is 1228321769. The reversal of 1228321760 is 671238221.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228321769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3838346 + ... + 3838665.

It is an arithmetic number, because the mean of its divisors is an integer number (120912939).

Almost surely, 2^1228321760 is an apocalyptic number.

1228321760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1228321760 is an abundant number, since it is smaller than the sum of its proper divisors (1673588776).

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

1228321760 is an equidigital number, since it uses as much as digits as its factorization.

1228321760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7677026 (or 7677018 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 1228321760 is about 35047.4215884707. The cubic root of 1228321760 is about 1070.9537482754.

Adding to 1228321760 its reverse (671238221), we get a palindrome (1899559981).

It can be divided in two parts, 12283 and 21760, that added together give a palindrome (34043).

The spelling of 1228321760 in words is "one billion, two hundred twenty-eight million, three hundred twenty-one thousand, seven hundred sixty".