685910434 has 8 divisors (see below), whose sum is σ = 1122398928. Its totient is φ = 311777460.

The previous prime is 685910419. The next prime is 685910437. The reversal of 685910434 is 434019586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (685910437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15588852 + ... + 15588895.

It is an arithmetic number, because the mean of its divisors is an integer number (140299866).

Almost surely, 2^685910434 is an apocalyptic number.

685910434 is a deficient number, since it is larger than the sum of its proper divisors (436488494).

685910434 is a wasteful number, since it uses less digits than its factorization.

685910434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31177760.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 685910434 is about 26189.8918287190. The cubic root of 685910434 is about 881.9063502324.

It can be divided in two parts, 685 and 910434, that added together give a palindrome (911119).

The spelling of 685910434 in words is "six hundred eighty-five million, nine hundred ten thousand, four hundred thirty-four".