1228643193 has 8 divisors (see below), whose sum is σ = 1734555168. Its totient is φ = 770913344.

The previous prime is 1228643179. The next prime is 1228643219. The reversal of 1228643193 is 3913468221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1228643193 - 2⁴ = 1228643177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1228643293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12045471 + ... + 12045572.

It is an arithmetic number, because the mean of its divisors is an integer number (216819396).

Almost surely, 2^1228643193 is an apocalyptic number.

It is an amenable number.

1228643193 is a deficient number, since it is larger than the sum of its proper divisors (505911975).

1228643193 is a wasteful number, since it uses less digits than its factorization.

1228643193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24091063.

The product of its digits is 62208, while the sum is 39.

The square root of 1228643193 is about 35052.0069753502. The cubic root of 1228643193 is about 1071.0471575281.

The spelling of 1228643193 in words is "one billion, two hundred twenty-eight million, six hundred forty-three thousand, one hundred ninety-three".