1428387278806 has 8 divisors (see below), whose sum is σ = 2188167746400. Its totient is φ = 698998030008.

The previous prime is 1428387278803. The next prime is 1428387278833. The reversal of 1428387278806 is 6088727838241.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428387278803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7597804581 + ... + 7597804768.

It is an arithmetic number, because the mean of its divisors is an integer number (273520968300).

Almost surely, 2^{1428387278806} is an apocalyptic number.

1428387278806 is a deficient number, since it is larger than the sum of its proper divisors (759780467594).

1428387278806 is a wasteful number, since it uses less digits than its factorization.

1428387278806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15195609398.

The product of its (nonzero) digits is 57802752, while the sum is 64.

The spelling of 1428387278806 in words is "one trillion, four hundred twenty-eight billion, three hundred eighty-seven million, two hundred seventy-eight thousand, eight hundred six".