680404844 has 24 divisors (see below), whose sum is σ = 1407735840. Its totient is φ = 281546496.

The previous prime is 680404843. The next prime is 680404871. The reversal of 680404844 is 448404086.

It is a super-3 number, since 3×680404844³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 680404798 and 680404807.

It is not an unprimeable number, because it can be changed into a prime (680404841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 418157 + ... + 419780.

It is an arithmetic number, because the mean of its divisors is an integer number (58655660).

Almost surely, 2^680404844 is an apocalyptic number.

It is an amenable number.

680404844 is an abundant number, since it is smaller than the sum of its proper divisors (727330996).

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

680404844 is a wasteful number, since it uses less digits than its factorization.

680404844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837977 (or 837975 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 38.

The square root of 680404844 is about 26084.5709951304. The cubic root of 680404844 is about 879.5404125666.

The spelling of 680404844 in words is "six hundred eighty million, four hundred four thousand, eight hundred forty-four".