1226729544 has 16 divisors (see below), whose sum is σ = 3066823920. Its totient is φ = 408909840.

The previous prime is 1226729533. The next prime is 1226729549. The reversal of 1226729544 is 4459276221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1226729496 and 1226729505.

It is not an unprimeable number, because it can be changed into a prime (1226729549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25556842 + ... + 25556889.

It is an arithmetic number, because the mean of its divisors is an integer number (191676495).

Almost surely, 2^1226729544 is an apocalyptic number.

It is an amenable number.

1226729544 is an abundant number, since it is smaller than the sum of its proper divisors (1840094376).

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

1226729544 is a wasteful number, since it uses less digits than its factorization.

1226729544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51113740 (or 51113736 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 1226729544 is about 35024.6990565230. The cubic root of 1226729544 is about 1070.4908057833.

The spelling of 1226729544 in words is "one billion, two hundred twenty-six million, seven hundred twenty-nine thousand, five hundred forty-four".