428778802848 has 48 divisors (see below), whose sum is σ = 1227866574816. Its totient is φ = 129932970240.

The previous prime is 428778802819. The next prime is 428778802867. The reversal of 428778802848 is 848208877824.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×428778802848² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 203019211 + ... + 203021322.

It is an arithmetic number, because the mean of its divisors is an integer number (25580553642).

Almost surely, 2^428778802848 is an apocalyptic number.

428778802848 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

428778802848 is an abundant number, since it is smaller than the sum of its proper divisors (799087771968).

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

428778802848 is a wasteful number, since it uses less digits than its factorization.

428778802848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406040557 (or 406040549 counting only the distinct ones).

The product of its (nonzero) digits is 102760448, while the sum is 66.

The spelling of 428778802848 in words is "four hundred twenty-eight billion, seven hundred seventy-eight million, eight hundred two thousand, eight hundred forty-eight".