428176380887 has 4 divisors (see below), whose sum is σ = 428339747256. Its totient is φ = 428013014520.

The previous prime is 428176380857. The next prime is 428176380917. The reversal of 428176380887 is 788083671824.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (428176380857) and next prime (428176380917).

It is a cyclic number.

It is not a de Polignac number, because 428176380887 - 2⁸ = 428176380631 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 (428176380857) 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, 81679253 + ... + 81684494.

It is an arithmetic number, because the mean of its divisors is an integer number (107084936814).

Almost surely, 2^428176380887 is an apocalyptic number.

428176380887 is a deficient number, since it is larger than the sum of its proper divisors (163366369).

428176380887 is a wasteful number, since it uses less digits than its factorization.

428176380887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163366368.

The product of its (nonzero) digits is 28901376, while the sum is 62.

The spelling of 428176380887 in words is "four hundred twenty-eight billion, one hundred seventy-six million, three hundred eighty thousand, eight hundred eighty-seven".