685849620 has 24 divisors (see below), whose sum is σ = 1920379104. Its totient is φ = 182893216.

The previous prime is 685849607. The next prime is 685849621. The reversal of 685849620 is 26948586.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 685849620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685849621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5715354 + ... + 5715473.

It is an arithmetic number, because the mean of its divisors is an integer number (80015796).

Almost surely, 2^685849620 is an apocalyptic number.

685849620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

685849620 is an abundant number, since it is smaller than the sum of its proper divisors (1234529484).

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

685849620 is a wasteful number, since it uses less digits than its factorization.

685849620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11430839 (or 11430837 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The square root of 685849620 is about 26188.7307825332. The cubic root of 685849620 is about 881.8802856837.

The spelling of 685849620 in words is "six hundred eighty-five million, eight hundred forty-nine thousand, six hundred twenty".