680936240 has 40 divisors (see below), whose sum is σ = 1637774640. Its totient is φ = 262981376.

The previous prime is 680936237. The next prime is 680936251. The reversal of 680936240 is 42639086.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 680936194 and 680936203.

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, 144434 + ... + 149073.

It is an arithmetic number, because the mean of its divisors is an integer number (40944366).

Almost surely, 2^680936240 is an apocalyptic number.

It is an amenable number.

680936240 is an abundant number, since it is smaller than the sum of its proper divisors (956838400).

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

680936240 is a wasteful number, since it uses less digits than its factorization.

680936240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293549 (or 293543 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 680936240 is about 26094.7550285493. The cubic root of 680936240 is about 879.7693265915.

The spelling of 680936240 in words is "six hundred eighty million, nine hundred thirty-six thousand, two hundred forty".