684685022 has 16 divisors (see below), whose sum is σ = 1224778752. Its totient is φ = 280678200.

The previous prime is 684684997. The next prime is 684685061. The reversal of 684685022 is 220586486.

It is a super-2 number, since 2×684685022² = 937587158702280968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1062854 + ... + 1063497.

It is an arithmetic number, because the mean of its divisors is an integer number (76548672).

Almost surely, 2^684685022 is an apocalyptic number.

684685022 is a deficient number, since it is larger than the sum of its proper divisors (540093730).

684685022 is a wasteful number, since it uses less digits than its factorization.

684685022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2126383.

The product of its (nonzero) digits is 184320, while the sum is 41.

The square root of 684685022 is about 26166.4866193381. The cubic root of 684685022 is about 881.3808477840.

The spelling of 684685022 in words is "six hundred eighty-four million, six hundred eighty-five thousand, twenty-two".