1226729560 has 32 divisors (see below), whose sum is σ = 3154448160. Its totient is φ = 420592896.

The previous prime is 1226729549. The next prime is 1226729597. The reversal of 1226729560 is 659276221.

It is a Harshad number since it is a multiple of its sum of digits (40).

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 in 7 ways as a sum of consecutive naturals, for example, 2190309 + ... + 2190868.

It is an arithmetic number, because the mean of its divisors is an integer number (98576505).

Almost surely, 2^1226729560 is an apocalyptic number.

1226729560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1226729560 is an abundant number, since it is smaller than the sum of its proper divisors (1927718600).

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

1226729560 is a wasteful number, since it uses less digits than its factorization.

1226729560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4381195 (or 4381191 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 1226729560 is about 35024.6992849332. The cubic root of 1226729560 is about 1070.4908104374.

The spelling of 1226729560 in words is "one billion, two hundred twenty-six million, seven hundred twenty-nine thousand, five hundred sixty".