684274018 has 16 divisors (see below), whose sum is σ = 1083925440. Its totient is φ = 323082000.

The previous prime is 684273991. The next prime is 684274039. The reversal of 684274018 is 810472486.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17133 + ... + 40768.

It is an arithmetic number, because the mean of its divisors is an integer number (67745340).

Almost surely, 2^684274018 is an apocalyptic number.

684274018 is a deficient number, since it is larger than the sum of its proper divisors (399651422).

684274018 is a wasteful number, since it uses less digits than its factorization.

684274018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58233.

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 684274018 is about 26158.6318067287. The cubic root of 684274018 is about 881.2044535050.

The spelling of 684274018 in words is "six hundred eighty-four million, two hundred seventy-four thousand, eighteen".