685433376 has 72 divisors (see below), whose sum is σ = 1962405900. Its totient is φ = 226930176.

The previous prime is 685433363. The next prime is 685433381. The reversal of 685433376 is 673334586.

685433376 is a `hidden beast` number, since 6 + 8 + 543 + 33 + 76 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 679957776 + 5475600 = 26076^2 + 2340^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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, 34926 + ... + 50898.

Almost surely, 2^685433376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685433376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (981202950).

685433376 is an abundant number, since it is smaller than the sum of its proper divisors (1276972524).

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

685433376 is a wasteful number, since it uses less digits than its factorization.

685433376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16138 (or 16127 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 45.

The square root of 685433376 is about 26180.7825704275. The cubic root of 685433376 is about 881.7018443985.

The spelling of 685433376 in words is "six hundred eighty-five million, four hundred thirty-three thousand, three hundred seventy-six".