1228313880 has 96 divisors (see below), whose sum is σ = 3996626400. Its totient is φ = 327172608.

The previous prime is 1228313857. The next prime is 1228313887. The reversal of 1228313880 is 883138221.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228313887) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 462717 + ... + 465363.

It is an arithmetic number, because the mean of its divisors is an integer number (41631525).

Almost surely, 2^1228313880 is an apocalyptic number.

1228313880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1228313880 is an abundant number, since it is smaller than the sum of its proper divisors (2768312520).

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

1228313880 is a wasteful number, since it uses less digits than its factorization.

1228313880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3953 (or 3946 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 1228313880 is about 35047.3091691787. The cubic root of 1228313880 is about 1070.9514581226.

The spelling of 1228313880 in words is "one billion, two hundred twenty-eight million, three hundred thirteen thousand, eight hundred eighty".