1228340343 has 4 divisors (see below), whose sum is σ = 1637787128. Its totient is φ = 818893560.

The previous prime is 1228340341. The next prime is 1228340363. The reversal of 1228340343 is 3430438221.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1228340343 - 2¹ = 1228340341 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1228340343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228340341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204723388 + ... + 204723393.

It is an arithmetic number, because the mean of its divisors is an integer number (409446782).

Almost surely, 2^1228340343 is an apocalyptic number.

1228340343 is a deficient number, since it is larger than the sum of its proper divisors (409446785).

1228340343 is an equidigital number, since it uses as much as digits as its factorization.

1228340343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409446784.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 1228340343 is about 35047.6866996953. The cubic root of 1228340343 is about 1070.9591489866.

Adding to 1228340343 its reverse (3430438221), we get a palindrome (4658778564).

It can be divided in two parts, 12283403 and 43, that added together give a triangular number (12283446 = T₄₉₅₆).

The spelling of 1228340343 in words is "one billion, two hundred twenty-eight million, three hundred forty thousand, three hundred forty-three".