684354624 has 56 divisors (see below), whose sum is σ = 1812877248. Its totient is φ = 227842560.

The previous prime is 684354623. The next prime is 684354631. The reversal of 684354624 is 426453486.

It is not an unprimeable number, because it can be changed into a prime (684354623) by changing a digit.

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, 212869 + ... + 216059.

It is an arithmetic number, because the mean of its divisors is an integer number (32372808).

Almost surely, 2^684354624 is an apocalyptic number.

684354624 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

684354624 is an abundant number, since it is smaller than the sum of its proper divisors (1128522624).

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

684354624 is a wasteful number, since it uses less digits than its factorization.

684354624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4323 (or 4313 counting only the distinct ones).

The product of its digits is 552960, while the sum is 42.

The square root of 684354624 is about 26160.1724764956. The cubic root of 684354624 is about 881.2390534730.

The spelling of 684354624 in words is "six hundred eighty-four million, three hundred fifty-four thousand, six hundred twenty-four".