685893040 has 40 divisors (see below), whose sum is σ = 1822517280. Its totient is φ = 235163136.

The previous prime is 685893037. The next prime is 685893049. The reversal of 685893040 is 40398586.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (685893049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 611845 + ... + 612964.

It is an arithmetic number, because the mean of its divisors is an integer number (45562932).

Almost surely, 2^685893040 is an apocalyptic number.

It is an amenable number.

685893040 is an abundant number, since it is smaller than the sum of its proper divisors (1136624240).

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

685893040 is a wasteful number, since it uses less digits than its factorization.

685893040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224829 (or 1224823 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 685893040 is about 26189.5597519317. The cubic root of 685893040 is about 881.8988954162.

The spelling of 685893040 in words is "six hundred eighty-five million, eight hundred ninety-three thousand, forty".