680278986 has 24 divisors (see below), whose sum is σ = 1528529184. Its totient is φ = 226759500.

The previous prime is 680278979. The next prime is 680278993. The reversal of 680278986 is 689872086.

It is an interprime number because it is at equal distance from previous prime (680278979) and next prime (680278993).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 699390 + ... + 700361.

It is an arithmetic number, because the mean of its divisors is an integer number (63688716).

Almost surely, 2^680278986 is an apocalyptic number.

680278986 is an abundant number, since it is smaller than the sum of its proper divisors (848250198).

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

680278986 is a wasteful number, since it uses less digits than its factorization.

680278986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399768 (or 1399756 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The square root of 680278986 is about 26082.1583846123. The cubic root of 680278986 is about 879.4861781774.

The spelling of 680278986 in words is "six hundred eighty million, two hundred seventy-eight thousand, nine hundred eighty-six".