685084740 has 24 divisors (see below), whose sum is σ = 1918237440. Its totient is φ = 182689248.

The previous prime is 685084733. The next prime is 685084759. The reversal of 685084740 is 47480586.

It is a super-2 number, since 2×685084740² = 938682201961735200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 685084692 and 685084701.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5708980 + ... + 5709099.

It is an arithmetic number, because the mean of its divisors is an integer number (79926560).

Almost surely, 2^685084740 is an apocalyptic number.

685084740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

685084740 is an abundant number, since it is smaller than the sum of its proper divisors (1233152700).

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

685084740 is a wasteful number, since it uses less digits than its factorization.

685084740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11418091 (or 11418089 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 685084740 is about 26174.1234810261. The cubic root of 685084740 is about 881.5523306521.

The spelling of 685084740 in words is "six hundred eighty-five million, eighty-four thousand, seven hundred forty".