428086756878 has 64 divisors (see below), whose sum is σ = 989634412800. Its totient is φ = 122007872000.

The previous prime is 428086756871. The next prime is 428086756891. The reversal of 428086756878 is 878657680824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428086756871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1496548 + ... + 1759496.

It is an arithmetic number, because the mean of its divisors is an integer number (15463037700).

Almost surely, 2^428086756878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 428086756878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (494817206400).

428086756878 is an abundant number, since it is smaller than the sum of its proper divisors (561547655922).

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

428086756878 is a wasteful number, since it uses less digits than its factorization.

428086756878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264433.

The product of its (nonzero) digits is 289013760, while the sum is 69.

The spelling of 428086756878 in words is "four hundred twenty-eight billion, eighty-six million, seven hundred fifty-six thousand, eight hundred seventy-eight".