684885130 has 16 divisors (see below), whose sum is σ = 1233924840. Its totient is φ = 273702592.

The previous prime is 684885119. The next prime is 684885151. The reversal of 684885130 is 31588486.

It can be written as a sum of positive squares in 4 ways, for example, as 204004089 + 480881041 = 14283^2 + 21929^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19789 + ... + 41968.

Almost surely, 2^684885130 is an apocalyptic number.

684885130 is a deficient number, since it is larger than the sum of its proper divisors (549039710).

684885130 is a wasteful number, since it uses less digits than its factorization.

684885130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62873.

The product of its (nonzero) digits is 184320, while the sum is 43.

The square root of 684885130 is about 26170.3100860498. The cubic root of 684885130 is about 881.4667043816.

The spelling of 684885130 in words is "six hundred eighty-four million, eight hundred eighty-five thousand, one hundred thirty".