685492500 has 240 divisors, whose sum is σ = 2494001664. Its totient is φ = 142320000.

The previous prime is 685492499. The next prime is 685492519. The reversal of 685492500 is 5294586.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 576907 + ... + 578093.

Almost surely, 2^685492500 is an apocalyptic number.

685492500 is a gapful number since it is divisible by the number (60) 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 685492500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1247000832).

685492500 is an abundant number, since it is smaller than the sum of its proper divisors (1808509164).

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

685492500 is a wasteful number, since it uses less digits than its factorization.

685492500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1232 (or 1215 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 685492500 is about 26181.9116949088. The cubic root of 685492500 is about 881.7271949008.

The spelling of 685492500 in words is "six hundred eighty-five million, four hundred ninety-two thousand, five hundred".