685418410 has 36 divisors (see below), whose sum is σ = 1313292582. Its totient is φ = 257510016.

The previous prime is 685418381. The next prime is 685418411. The reversal of 685418410 is 14814586.

It can be written as a sum of positive squares in 3 ways, for example, as 666207721 + 19210689 = 25811^2 + 4383^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 685418410.

It is not an unprimeable number, because it can be changed into a prime (685418411) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1407187 + ... + 1407673.

Almost surely, 2^685418410 is an apocalyptic number.

685418410 is a deficient number, since it is larger than the sum of its proper divisors (627874172).

685418410 is an equidigital number, since it uses as much as digits as its factorization.

685418410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015 (or 511 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 685418410 is about 26180.4967485340. The cubic root of 685418410 is about 881.6954272196.

The spelling of 685418410 in words is "six hundred eighty-five million, four hundred eighteen thousand, four hundred ten".