685394370 has 48 divisors (see below), whose sum is σ = 1783416960. Its totient is φ = 182629152.

The previous prime is 685394351. The next prime is 685394377. The reversal of 685394370 is 73493586.

685394370 is a `hidden beast` number, since 6 + 8 + 539 + 43 + 70 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (685394377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165991 + ... + 170069.

It is an arithmetic number, because the mean of its divisors is an integer number (37154520).

Almost surely, 2^685394370 is an apocalyptic number.

685394370 is an abundant number, since it is smaller than the sum of its proper divisors (1098022590).

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

685394370 is a wasteful number, since it uses less digits than its factorization.

685394370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5959 (or 5956 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The square root of 685394370 is about 26180.0376241135. The cubic root of 685394370 is about 881.6851190606.

The spelling of 685394370 in words is "six hundred eighty-five million, three hundred ninety-four thousand, three hundred seventy".