685024704 has 252 divisors, whose sum is σ = 2461086264. Its totient is φ = 180569088.

The previous prime is 685024667. The next prime is 685024733. The reversal of 685024704 is 407420586.

It is a tau number, because it is divible by the number of its divisors (252).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 365979 + ... + 367845.

Almost surely, 2^685024704 is an apocalyptic number.

685024704 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685024704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1230543132).

685024704 is an abundant number, since it is smaller than the sum of its proper divisors (1776061560).

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

685024704 is a wasteful number, since it uses less digits than its factorization.

685024704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912 (or 1892 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 685024704 is about 26172.9765980104. The cubic root of 685024704 is about 881.5265788880.

The spelling of 685024704 in words is "six hundred eighty-five million, twenty-four thousand, seven hundred four".