1287880429278 has 16 divisors (see below), whose sum is σ = 2575787898240. Its totient is φ = 429288969816.

The previous prime is 1287880429261. The next prime is 1287880429331. The reversal of 1287880429278 is 8729240887821.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 478818 + ... + 1674821.

It is an arithmetic number, because the mean of its divisors is an integer number (160986743640).

Almost surely, 2^{1287880429278} is an apocalyptic number.

1287880429278 is an abundant number, since it is smaller than the sum of its proper divisors (1287907468962).

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

1287880429278 is a wasteful number, since it uses less digits than its factorization.

1287880429278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2253311.

The product of its (nonzero) digits is 57802752, while the sum is 66.

The spelling of 1287880429278 in words is "one trillion, two hundred eighty-seven billion, eight hundred eighty million, four hundred twenty-nine thousand, two hundred seventy-eight".