1272358944 has 144 divisors (see below), whose sum is σ = 3701067552. Its totient is φ = 414526464.

The previous prime is 1272358943. The next prime is 1272358957. The reversal of 1272358944 is 4498532721.

1272358944 is a `hidden beast` number, since 1 + 2 + 7 + 23 + 589 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a self number, because there is not a number n which added to its sum of digits gives 1272358944.

It is not an unprimeable number, because it can be changed into a prime (1272358943) 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 23 ways as a sum of consecutive naturals, for example, 4495827 + ... + 4496109.

It is an arithmetic number, because the mean of its divisors is an integer number (25701858).

Almost surely, 2^1272358944 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 1272358944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1850533776).

1272358944 is an abundant number, since it is smaller than the sum of its proper divisors (2428708608).

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

1272358944 is a wasteful number, since it uses less digits than its factorization.

1272358944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599 (or 588 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 1272358944 is about 35670.1407903025. The cubic root of 1272358944 is about 1083.6022105835.

The spelling of 1272358944 in words is "one billion, two hundred seventy-two million, three hundred fifty-eight thousand, nine hundred forty-four".