1296758478 has 8 divisors (see below), whose sum is σ = 2593516968. Its totient is φ = 432252824.

The previous prime is 1296758467. The next prime is 1296758479. The reversal of 1296758478 is 8748576921.

It is a sphenic number, since it is the product of 3 distinct primes.

1296758478 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296758479) 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, 108063201 + ... + 108063212.

It is an arithmetic number, because the mean of its divisors is an integer number (324189621).

Almost surely, 2^1296758478 is an apocalyptic number.

1296758478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1296758478 is a wasteful number, since it uses less digits than its factorization.

1296758478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216126418.

The product of its digits is 6773760, while the sum is 57.

The square root of 1296758478 is about 36010.5328758129. The cubic root of 1296758478 is about 1090.4850065032.

The spelling of 1296758478 in words is "one billion, two hundred ninety-six million, seven hundred fifty-eight thousand, four hundred seventy-eight".