1229260776 has 64 divisors (see below), whose sum is σ = 3141465600. Its totient is φ = 400723200.

The previous prime is 1229260771. The next prime is 1229260819. The reversal of 1229260776 is 6770629221.

It is a super-2 number, since 2×1229260776² = 3022164110824244352, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1229260771) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 262665 + ... + 267303.

It is an arithmetic number, because the mean of its divisors is an integer number (49085400).

Almost surely, 2^1229260776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1229260776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1570732800).

1229260776 is an abundant number, since it is smaller than the sum of its proper divisors (1912204824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1229260776 is a wasteful number, since it uses less digits than its factorization.

1229260776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4890 (or 4886 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 1229260776 is about 35060.8153926859. The cubic root of 1229260776 is about 1071.2265830176.

Adding to 1229260776 its reverse (6770629221), we get a palindrome (7999889997).

The spelling of 1229260776 in words is "one billion, two hundred twenty-nine million, two hundred sixty thousand, seven hundred seventy-six".