680187638 has 8 divisors (see below), whose sum is σ = 1098764688. Its totient is φ = 313932744.

The previous prime is 680187623. The next prime is 680187653. The reversal of 680187638 is 836781086.

It is an interprime number because it is at equal distance from previous prime (680187623) and next prime (680187653).

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

It is a junction number, because it is equal to n+sod(n) for n = 680187592 and 680187601.

It is a congruent number.

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, 13080506 + ... + 13080557.

It is an arithmetic number, because the mean of its divisors is an integer number (137345586).

Almost surely, 2^680187638 is an apocalyptic number.

680187638 is a deficient number, since it is larger than the sum of its proper divisors (418577050).

680187638 is a wasteful number, since it uses less digits than its factorization.

680187638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26161078.

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 680187638 is about 26080.4071670670. The cubic root of 680187638 is about 879.4468105545.

The spelling of 680187638 in words is "six hundred eighty million, one hundred eighty-seven thousand, six hundred thirty-eight".