685411776 has 336 divisors, whose sum is σ = 2472537600. Its totient is φ = 177002496.

The previous prime is 685411751. The next prime is 685411789. The reversal of 685411776 is 677114586.

It is a tau number, because it is divible by the number of its divisors (336).

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 47 ways as a sum of consecutive naturals, for example, 1761790 + ... + 1762178.

Almost surely, 2^685411776 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 685411776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1236268800).

685411776 is an abundant number, since it is smaller than the sum of its proper divisors (1787125824).

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

685411776 is a wasteful number, since it uses less digits than its factorization.

685411776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456 (or 443 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 685411776 is about 26180.3700508606. The cubic root of 685411776 is about 881.6925826378.

The spelling of 685411776 in words is "six hundred eighty-five million, four hundred eleven thousand, seven hundred seventy-six".