685274040 has 256 divisors, whose sum is σ = 2560896000. Its totient is φ = 161533440.

The previous prime is 685274039. The next prime is 685274059. The reversal of 685274040 is 40472586.

685274040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 685273986 and 685274004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 438781 + ... + 440339.

It is an arithmetic number, because the mean of its divisors is an integer number (10003500).

Almost surely, 2^685274040 is an apocalyptic number.

685274040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685274040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1280448000).

685274040 is an abundant number, since it is smaller than the sum of its proper divisors (1875621960).

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

685274040 is a wasteful number, since it uses less digits than its factorization.

685274040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627 (or 1617 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 685274040 is about 26177.7393981986. The cubic root of 685274040 is about 881.6335188995.

The spelling of 685274040 in words is "six hundred eighty-five million, two hundred seventy-four thousand, forty".