685682624 has 224 divisors, whose sum is σ = 1706489856. Its totient is φ = 269434880.

The previous prime is 685682603. The next prime is 685682629. The reversal of 685682624 is 426286586.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685682629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12937382 + ... + 12937434.

Almost surely, 2^685682624 is an apocalyptic number.

685682624 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 685682624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (853244928).

685682624 is an abundant number, since it is smaller than the sum of its proper divisors (1020807232).

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

685682624 is a wasteful number, since it uses less digits than its factorization.

685682624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 153 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 47.

The square root of 685682624 is about 26185.5422704973. The cubic root of 685682624 is about 881.8087041832.

The spelling of 685682624 in words is "six hundred eighty-five million, six hundred eighty-two thousand, six hundred twenty-four".