685004826 has 32 divisors (see below), whose sum is σ = 1509368256. Its totient is φ = 205520000.

The previous prime is 685004821. The next prime is 685004833. The reversal of 685004826 is 628400586.

It is a super-2 number, since 2×685004826² = 938463223286580552, which contains 22 as substring.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (685004821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44715 + ... + 58046.

It is an arithmetic number, because the mean of its divisors is an integer number (47167758).

Almost surely, 2^685004826 is an apocalyptic number.

685004826 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

685004826 is an abundant number, since it is smaller than the sum of its proper divisors (824363430).

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

685004826 is a wasteful number, since it uses less digits than its factorization.

685004826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102878.

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 685004826 is about 26172.5968524333. The cubic root of 685004826 is about 881.5180521129.

The spelling of 685004826 in words is "six hundred eighty-five million, four thousand, eight hundred twenty-six".