685801026 has 32 divisors (see below), whose sum is σ = 1552763520. Its totient is φ = 224286192.

The previous prime is 685801021. The next prime is 685801037. The reversal of 685801026 is 620108586.

It is a happy number.

685801026 is a `hidden beast` number, since 68 + 580 + 10 + 2 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (685801021) 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, 116950 + ... + 122673.

It is an arithmetic number, because the mean of its divisors is an integer number (48523860).

Almost surely, 2^685801026 is an apocalyptic number.

685801026 is an abundant number, since it is smaller than the sum of its proper divisors (866962494).

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

685801026 is a wasteful number, since it uses less digits than its factorization.

685801026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239687 (or 239681 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 685801026 is about 26187.8030006337. The cubic root of 685801026 is about 881.8594574528.

The spelling of 685801026 in words is "six hundred eighty-five million, eight hundred one thousand, twenty-six".