684287986 has 8 divisors (see below), whose sum is σ = 1059542784. Its totient is φ = 331107060.

The previous prime is 684287977. The next prime is 684287987. The reversal of 684287986 is 689782486.

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

It is a self number, because there is not a number n which added to its sum of digits gives 684287986.

It is not an unprimeable number, because it can be changed into a prime (684287987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5518390 + ... + 5518513.

It is an arithmetic number, because the mean of its divisors is an integer number (132442848).

Almost surely, 2^684287986 is an apocalyptic number.

684287986 is a deficient number, since it is larger than the sum of its proper divisors (375254798).

684287986 is a wasteful number, since it uses less digits than its factorization.

684287986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11036936.

The product of its digits is 9289728, while the sum is 58.

The square root of 684287986 is about 26158.8987918070. The cubic root of 684287986 is about 881.2104494364.

The spelling of 684287986 in words is "six hundred eighty-four million, two hundred eighty-seven thousand, nine hundred eighty-six".