428905406784 has 28 divisors (see below), whose sum is σ = 1134812222624. Its totient is φ = 142968468864.

The previous prime is 428905406771. The next prime is 428905406837. The reversal of 428905406784 is 487604509824.

It is a super-3 number, since 3×428905406784³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1116940972 + ... + 1116941355.

Almost surely, 2^428905406784 is an apocalyptic number.

It is an amenable number.

428905406784 is an abundant number, since it is smaller than the sum of its proper divisors (705906815840).

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

428905406784 is a wasteful number, since it uses less digits than its factorization.

428905406784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233882342 (or 2233882332 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 57.

The spelling of 428905406784 in words is "four hundred twenty-eight billion, nine hundred five million, four hundred six thousand, seven hundred eighty-four".