1226729568 has 24 divisors (see below), whose sum is σ = 3220165368. Its totient is φ = 408909824.

The previous prime is 1226729549. The next prime is 1226729597. The reversal of 1226729568 is 8659276221.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6389121 + ... + 6389312.

It is an arithmetic number, because the mean of its divisors is an integer number (134173557).

Almost surely, 2^1226729568 is an apocalyptic number.

It is an amenable number.

1226729568 is an abundant number, since it is smaller than the sum of its proper divisors (1993435800).

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

1226729568 is a wasteful number, since it uses less digits than its factorization.

1226729568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12778446 (or 12778438 counting only the distinct ones).

The product of its digits is 725760, while the sum is 48.

The square root of 1226729568 is about 35024.6993991383. The cubic root of 1226729568 is about 1070.4908127644.

The spelling of 1226729568 in words is "one billion, two hundred twenty-six million, seven hundred twenty-nine thousand, five hundred sixty-eight".