685671950 has 48 divisors (see below), whose sum is σ = 1322070144. Its totient is φ = 264297600.

The previous prime is 685671923. The next prime is 685671953. The reversal of 685671950 is 59176586.

It is a junction number, because it is equal to n+sod(n) for n = 685671895 and 685671904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685671953) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 428552 + ... + 430148.

It is an arithmetic number, because the mean of its divisors is an integer number (27543128).

Almost surely, 2^685671950 is an apocalyptic number.

685671950 is a deficient number, since it is larger than the sum of its proper divisors (636398194).

685671950 is a wasteful number, since it uses less digits than its factorization.

685671950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1917 (or 1912 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 47.

The square root of 685671950 is about 26185.3384549446. The cubic root of 685671950 is about 881.8041284633.

The spelling of 685671950 in words is "six hundred eighty-five million, six hundred seventy-one thousand, nine hundred fifty".