1228140128 has 12 divisors (see below), whose sum is σ = 2417900940. Its totient is φ = 614070048.

The previous prime is 1228140119. The next prime is 1228140181. The reversal of 1228140128 is 8210418221.

It is a self number, because there is not a number n which added to its sum of digits gives 1228140128.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19189658 + ... + 19189721.

It is an arithmetic number, because the mean of its divisors is an integer number (201491745).

Almost surely, 2^1228140128 is an apocalyptic number.

It is an amenable number.

1228140128 is a deficient number, since it is larger than the sum of its proper divisors (1189760812).

1228140128 is an equidigital number, since it uses as much as digits as its factorization.

1228140128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38379389 (or 38379381 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 29.

The square root of 1228140128 is about 35044.8302606818. The cubic root of 1228140128 is about 1070.9009583452.

Adding to 1228140128 its reverse (8210418221), we get a palindrome (9438558349).

The spelling of 1228140128 in words is "one billion, two hundred twenty-eight million, one hundred forty thousand, one hundred twenty-eight".