1228611764 has 6 divisors (see below), whose sum is σ = 2150070594. Its totient is φ = 614305880.

The previous prime is 1228611749. The next prime is 1228611779. The reversal of 1228611764 is 4671168221.

It is an interprime number because it is at equal distance from previous prime (1228611749) and next prime (1228611779).

It can be written as a sum of positive squares in only one way, i.e., 1211736100 + 16875664 = 34810^2 + 4108^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153576467 + ... + 153576474.

It is an arithmetic number, because the mean of its divisors is an integer number (358345099).

Almost surely, 2^1228611764 is an apocalyptic number.

It is an amenable number.

1228611764 is a deficient number, since it is larger than the sum of its proper divisors (921458830).

1228611764 is a wasteful number, since it uses less digits than its factorization.

1228611764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307152945 (or 307152943 counting only the distinct ones).

The product of its digits is 32256, while the sum is 38.

The square root of 1228611764 is about 35051.5586529330. The cubic root of 1228611764 is about 1071.0380248989.

Adding to 1228611764 its reverse (4671168221), we get a palindrome (5899779985).

The spelling of 1228611764 in words is "one billion, two hundred twenty-eight million, six hundred eleven thousand, seven hundred sixty-four".