680403136 has 56 divisors (see below), whose sum is σ = 1553565600. Its totient is φ = 289615872.

The previous prime is 680403107. The next prime is 680403149. The reversal of 680403136 is 631304086.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 680403098 and 680403107.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61656 + ... + 71848.

Almost surely, 2^680403136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 680403136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (776782800).

680403136 is an abundant number, since it is smaller than the sum of its proper divisors (873162464).

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

680403136 is a wasteful number, since it uses less digits than its factorization.

680403136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10361 (or 10351 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 680403136 is about 26084.5382554493. The cubic root of 680403136 is about 879.5396766046.

The spelling of 680403136 in words is "six hundred eighty million, four hundred three thousand, one hundred thirty-six".