428191885277 has 8 divisors (see below), whose sum is σ = 461361823776. Its totient is φ = 395055104112.

The previous prime is 428191885259. The next prime is 428191885321. The reversal of 428191885277 is 772588191824.

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

It is a cyclic number.

It is not a de Polignac number, because 428191885277 - 2³² = 423896917981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428191885237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8262503 + ... + 8314164.

It is an arithmetic number, because the mean of its divisors is an integer number (57670227972).

Almost surely, 2^428191885277 is an apocalyptic number.

It is an amenable number.

428191885277 is a deficient number, since it is larger than the sum of its proper divisors (33169938499).

428191885277 is a wasteful number, since it uses less digits than its factorization.

428191885277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16578667.

The product of its digits is 18063360, while the sum is 62.

The spelling of 428191885277 in words is "four hundred twenty-eight billion, one hundred ninety-one million, eight hundred eighty-five thousand, two hundred seventy-seven".