684491046 has 16 divisors (see below), whose sum is σ = 1405982064. Its totient is φ = 221997024.

The previous prime is 684490999. The next prime is 684491051. The reversal of 684491046 is 640194486.

It is a junction number, because it is equal to n+sod(n) for n = 684490989 and 684491007.

It is a congruent number.

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, 1541425 + ... + 1541868.

It is an arithmetic number, because the mean of its divisors is an integer number (87873879).

Almost surely, 2^684491046 is an apocalyptic number.

684491046 is an abundant number, since it is smaller than the sum of its proper divisors (721491018).

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

684491046 is a wasteful number, since it uses less digits than its factorization.

684491046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3083335.

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 684491046 is about 26162.7797835016. The cubic root of 684491046 is about 881.2976061602.

The spelling of 684491046 in words is "six hundred eighty-four million, four hundred ninety-one thousand, forty-six".