1276988478 has 8 divisors (see below), whose sum is σ = 2553976968. Its totient is φ = 425662824.

The previous prime is 1276988477. The next prime is 1276988509. The reversal of 1276988478 is 8748896721.

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

1276988478 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1276988477) 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, 106415701 + ... + 106415712.

It is an arithmetic number, because the mean of its divisors is an integer number (319247121).

Almost surely, 2^1276988478 is an apocalyptic number.

1276988478 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.

1276988478 is a wasteful number, since it uses less digits than its factorization.

1276988478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212831418.

The product of its digits is 10838016, while the sum is 60.

The square root of 1276988478 is about 35734.9755561691. The cubic root of 1276988478 is about 1084.9148645921.

The spelling of 1276988478 in words is "one billion, two hundred seventy-six million, nine hundred eighty-eight thousand, four hundred seventy-eight".