1296778044 has 48 divisors (see below), whose sum is σ = 3187882880. Its totient is φ = 409147200.

The previous prime is 1296778033. The next prime is 1296778061. The reversal of 1296778044 is 4408776921.

It is a junction number, because it is equal to n+sod(n) for n = 1296777984 and 1296778002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 391194 + ... + 394494.

Almost surely, 2^1296778044 is an apocalyptic number.

It is an amenable number.

1296778044 is an abundant number, since it is smaller than the sum of its proper divisors (1891104836).

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

1296778044 is a wasteful number, since it uses less digits than its factorization.

1296778044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5050 (or 5048 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 48.

The square root of 1296778044 is about 36010.8045453028. The cubic root of 1296778044 is about 1090.4904910307.

The spelling of 1296778044 in words is "one billion, two hundred ninety-six million, seven hundred seventy-eight thousand, forty-four".