680615898 has 8 divisors (see below), whose sum is σ = 1361231808. Its totient is φ = 226871964.

The previous prime is 680615861. The next prime is 680615909. The reversal of 680615898 is 898516086.

It is a sphenic number, since it is the product of 3 distinct primes.

680615898 is an admirable number.

It is a super-2 number, since 2×680615898² = 926476001220692808, 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 680615898.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56717986 + ... + 56717997.

It is an arithmetic number, because the mean of its divisors is an integer number (170153976).

Almost surely, 2^680615898 is an apocalyptic number.

680615898 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

680615898 is a wasteful number, since it uses less digits than its factorization.

680615898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113435988.

The product of its (nonzero) digits is 829440, while the sum is 51.

The square root of 680615898 is about 26088.6162530710. The cubic root of 680615898 is about 879.6313443766.

The spelling of 680615898 in words is "six hundred eighty million, six hundred fifteen thousand, eight hundred ninety-eight".