680272136 has 16 divisors (see below), whose sum is σ = 1350540540. Its totient is φ = 320128000.

The previous prime is 680272007. The next prime is 680272139. The reversal of 680272136 is 631272086.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 676312036 + 3960100 = 26006^2 + 1990^2 .

It is a junction number, because it is equal to n+sod(n) for n = 680272096 and 680272105.

It is not an unprimeable number, because it can be changed into a prime (680272139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2500865 + ... + 2501136.

Almost surely, 2^680272136 is an apocalyptic number.

It is an amenable number.

680272136 is a deficient number, since it is larger than the sum of its proper divisors (670268404).

680272136 is a wasteful number, since it uses less digits than its factorization.

680272136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5002024 (or 5002020 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 680272136 is about 26082.0270684623. The cubic root of 680272136 is about 879.4832262020.

Subtracting from 680272136 its reverse (631272086), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 680272136 in words is "six hundred eighty million, two hundred seventy-two thousand, one hundred thirty-six".