1296243648 has 308 divisors, whose sum is σ = 4499508400. Its totient is φ = 370355328.

The previous prime is 1296243647. The next prime is 1296243671. The reversal of 1296243648 is 8463426921.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

1296243648 is a `hidden beast` number, since 12 + 9 + 624 + 3 + 6 + 4 + 8 = 666.

It is an ABA number since it can be written as A⋅B^A, here for A=3, B=756.

It is a nude number because it is divisible by every one of its digits.

Its product of digits (497664) is a multiple of the sum of its prime divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296243647) 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 43 ways as a sum of consecutive naturals, for example, 185177661 + ... + 185177667.

Almost surely, 2^1296243648 is an apocalyptic number.

1296243648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1296243648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2249754200).

1296243648 is an abundant number, since it is smaller than the sum of its proper divisors (3203264752).

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

1296243648 is an frugal number, since it uses more digits than its factorization.

1296243648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63 (or 12 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 1296243648 is about 36003.3838409669. The cubic root of 1296243648 is about 1090.3406751524.

The spelling of 1296243648 in words is "one billion, two hundred ninety-six million, two hundred forty-three thousand, six hundred forty-eight".