684035478 has 24 divisors (see below), whose sum is σ = 1693802448. Its totient is φ = 195438672.

The previous prime is 684035461. The next prime is 684035489. The reversal of 684035478 is 874530486.

684035478 is a `hidden beast` number, since 68 + 40 + 3 + 547 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2714301 + ... + 2714552.

It is an arithmetic number, because the mean of its divisors is an integer number (70575102).

Almost surely, 2^684035478 is an apocalyptic number.

684035478 is an abundant number, since it is smaller than the sum of its proper divisors (1009766970).

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

684035478 is a wasteful number, since it uses less digits than its factorization.

684035478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5428868 (or 5428865 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The square root of 684035478 is about 26154.0719200663. The cubic root of 684035478 is about 881.1020447549.

The spelling of 684035478 in words is "six hundred eighty-four million, thirty-five thousand, four hundred seventy-eight".