684078474 has 16 divisors (see below), whose sum is σ = 1386899712. Its totient is φ = 224902368.

The previous prime is 684078469. The next prime is 684078497. The reversal of 684078474 is 474870486.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 780474 + ... + 781349.

It is an arithmetic number, because the mean of its divisors is an integer number (86681232).

Almost surely, 2^684078474 is an apocalyptic number.

684078474 is an abundant number, since it is smaller than the sum of its proper divisors (702821238).

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

684078474 is a wasteful number, since it uses less digits than its factorization.

684078474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561901.

The product of its (nonzero) digits is 1204224, while the sum is 48.

The square root of 684078474 is about 26154.8938824076. The cubic root of 684078474 is about 881.1205053324.

The spelling of 684078474 in words is "six hundred eighty-four million, seventy-eight thousand, four hundred seventy-four".