680740146 has 32 divisors (see below), whose sum is σ = 1601743680. Its totient is φ = 213565248.

The previous prime is 680740141. The next prime is 680740147. The reversal of 680740146 is 641047086.

It is a super-2 number, since 2×680740146² = 926814292752202632, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 680740146.

It is not an unprimeable number, because it can be changed into a prime (680740141) 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, 369856 + ... + 371691.

It is an arithmetic number, because the mean of its divisors is an integer number (50054490).

Almost surely, 2^680740146 is an apocalyptic number.

680740146 is an abundant number, since it is smaller than the sum of its proper divisors (921003534).

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

680740146 is a wasteful number, since it uses less digits than its factorization.

680740146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741575 (or 741569 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 680740146 is about 26090.9974129009. The cubic root of 680740146 is about 879.6848673625.

The spelling of 680740146 in words is "six hundred eighty million, seven hundred forty thousand, one hundred forty-six".