1228303893 has 4 divisors (see below), whose sum is σ = 1637738528. Its totient is φ = 818869260.

The previous prime is 1228303889. The next prime is 1228303931. The reversal of 1228303893 is 3983038221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3983038221 = 3 ⋅1327679407.

It is not a de Polignac number, because 1228303893 - 2² = 1228303889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228303823) 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, 204717313 + ... + 204717318.

It is an arithmetic number, because the mean of its divisors is an integer number (409434632).

Almost surely, 2^1228303893 is an apocalyptic number.

It is an amenable number.

1228303893 is a deficient number, since it is larger than the sum of its proper divisors (409434635).

1228303893 is an equidigital number, since it uses as much as digits as its factorization.

1228303893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409434634.

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

The square root of 1228303893 is about 35047.1666900479. The cubic root of 1228303893 is about 1070.9485556014.

The spelling of 1228303893 in words is "one billion, two hundred twenty-eight million, three hundred three thousand, eight hundred ninety-three".