685460144 has 10 divisors (see below), whose sum is σ = 1328079060. Its totient is φ = 342730064.

The previous prime is 685460143. The next prime is 685460161. The reversal of 685460144 is 441064586.

It is a junction number, because it is equal to n+sod(n) for n = 685460098 and 685460107.

It is not an unprimeable number, because it can be changed into a prime (685460141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21420614 + ... + 21420645.

It is an arithmetic number, because the mean of its divisors is an integer number (132807906).

Almost surely, 2^685460144 is an apocalyptic number.

It is an amenable number.

685460144 is a deficient number, since it is larger than the sum of its proper divisors (642618916).

685460144 is a wasteful number, since it uses less digits than its factorization.

685460144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42841267 (or 42841261 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 38.

The square root of 685460144 is about 26181.2937801019. The cubic root of 685460144 is about 881.7133218514.

The spelling of 685460144 in words is "six hundred eighty-five million, four hundred sixty thousand, one hundred forty-four".