427688784 has 60 divisors (see below), whose sum is σ = 1259939200. Its totient is φ = 135058752.

The previous prime is 427688731. The next prime is 427688851. The reversal of 427688784 is 487886724.

It is a happy number.

427688784 is a `hidden beast` number, since 427 + 68 + 87 + 84 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 427688784.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75424 + ... + 80895.

Almost surely, 2^427688784 is an apocalyptic number.

It is an amenable number.

427688784 is an abundant number, since it is smaller than the sum of its proper divisors (832250416).

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

427688784 is a wasteful number, since it uses less digits than its factorization.

427688784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156352 (or 156343 counting only the distinct ones).

The product of its digits is 4816896, while the sum is 54.

The square root of 427688784 is about 20680.6379011867. The cubic root of 427688784 is about 753.4294994750.

The spelling of 427688784 in words is "four hundred twenty-seven million, six hundred eighty-eight thousand, seven hundred eighty-four".