1226144556 has 144 divisors (see below), whose sum is σ = 4015648000. Its totient is φ = 306343296.

The previous prime is 1226144551. The next prime is 1226144603. The reversal of 1226144556 is 6554416221.

1226144556 is a `hidden beast` number, since 1 + 2 + 2 + 61 + 44 + 556 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1226144556.

It is not an unprimeable number, because it can be changed into a prime (1226144551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 52395 + ... + 72093.

Almost surely, 2^1226144556 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 1226144556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2007824000).

1226144556 is an abundant number, since it is smaller than the sum of its proper divisors (2789503444).

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

1226144556 is a wasteful number, since it uses less digits than its factorization.

1226144556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19748 (or 19743 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 1226144556 is about 35016.3469825166. The cubic root of 1226144556 is about 1070.3206178102.

The spelling of 1226144556 in words is "one billion, two hundred twenty-six million, one hundred forty-four thousand, five hundred fifty-six".