684028000 has 48 divisors (see below), whose sum is σ = 1680666624. Its totient is φ = 273609600.

The previous prime is 684027979. The next prime is 684028001. The reversal of 684028000 is 820486.

It is a self number, because there is not a number n which added to its sum of digits gives 684028000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684028001) 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, 81504 + ... + 89503.

It is an arithmetic number, because the mean of its divisors is an integer number (35013888).

Almost surely, 2^684028000 is an apocalyptic number.

It is an amenable number.

684028000 is an abundant number, since it is smaller than the sum of its proper divisors (996638624).

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

684028000 is a wasteful number, since it uses less digits than its factorization.

684028000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171032 (or 171014 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 684028000 is about 26153.9289591449. The cubic root of 684028000 is about 881.0988339540.

Adding to 684028000 its reverse (820486), we get a palindrome (684848486).

The spelling of 684028000 in words is "six hundred eighty-four million, twenty-eight thousand".