1228140433 has 8 divisors (see below), whose sum is σ = 1347568488. Its totient is φ = 1112277504.

The previous prime is 1228140427. The next prime is 1228140443. The reversal of 1228140433 is 3340418221.

It can be written as a sum of positive squares in 4 ways, for example, as 2650384 + 1225490049 = 1628^2 + 35007^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-1228140433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1228140413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 890560 + ... + 891937.

It is an arithmetic number, because the mean of its divisors is an integer number (168446061).

Almost surely, 2^1228140433 is an apocalyptic number.

1228140433 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1228140433 is a deficient number, since it is larger than the sum of its proper divisors (119428055).

1228140433 is a wasteful number, since it uses less digits than its factorization.

1228140433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782563.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 1228140433 is about 35044.8346122506. The cubic root of 1228140433 is about 1070.9010469955.

Adding to 1228140433 its reverse (3340418221), we get a palindrome (4568558654).

The spelling of 1228140433 in words is "one billion, two hundred twenty-eight million, one hundred forty thousand, four hundred thirty-three".