684773478 has 12 divisors (see below), whose sum is σ = 1483675908. Its totient is φ = 228257820.

The previous prime is 684773429. The next prime is 684773483. The reversal of 684773478 is 874377486.

684773478 is a `hidden beast` number, since 68 + 47 + 73 + 478 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19021468 + ... + 19021503.

It is an arithmetic number, because the mean of its divisors is an integer number (123639659).

Almost surely, 2^684773478 is an apocalyptic number.

684773478 is an abundant number, since it is smaller than the sum of its proper divisors (798902430).

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

684773478 is a wasteful number, since it uses less digits than its factorization.

684773478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38042979 (or 38042976 counting only the distinct ones).

The product of its digits is 6322176, while the sum is 54.

The square root of 684773478 is about 26168.1768184182. The cubic root of 684773478 is about 881.4188020085.

The spelling of 684773478 in words is "six hundred eighty-four million, seven hundred seventy-three thousand, four hundred seventy-eight".