680198390 has 16 divisors (see below), whose sum is σ = 1296378432. Its totient is φ = 256074624.

The previous prime is 680198371. The next prime is 680198399. The reversal of 680198390 is 93891086.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680198399) 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, 2000414 + ... + 2000753.

It is an arithmetic number, because the mean of its divisors is an integer number (81023652).

Almost surely, 2^680198390 is an apocalyptic number.

680198390 is a deficient number, since it is larger than the sum of its proper divisors (616180042).

680198390 is a wasteful number, since it uses less digits than its factorization.

680198390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4001191.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 680198390 is about 26080.6132980036. The cubic root of 680198390 is about 879.4514444534.

The spelling of 680198390 in words is "six hundred eighty million, one hundred ninety-eight thousand, three hundred ninety".