685354020 has 48 divisors (see below), whose sum is σ = 2066608320. Its totient is φ = 168702336.

The previous prime is 685353989. The next prime is 685354027. The reversal of 685354020 is 20453586.

It is not an unprimeable number, because it can be changed into a prime (685354027) 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 15 ways as a sum of consecutive naturals, for example, 438550 + ... + 440109.

It is an arithmetic number, because the mean of its divisors is an integer number (43054340).

Almost surely, 2^685354020 is an apocalyptic number.

685354020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

685354020 is an abundant number, since it is smaller than the sum of its proper divisors (1381254300).

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

685354020 is a wasteful number, since it uses less digits than its factorization.

685354020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878684 (or 878682 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 685354020 is about 26179.2669874464. The cubic root of 685354020 is about 881.6678167627.

The spelling of 685354020 in words is "six hundred eighty-five million, three hundred fifty-four thousand, twenty".