684762552 has 128 divisors (see below), whose sum is σ = 1996185600. Its totient is φ = 217240704.

The previous prime is 684762541. The next prime is 684762569. The reversal of 684762552 is 255267486.

It is a junction number, because it is equal to n+sod(n) for n = 684762498 and 684762507.

It is a congruent 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 31 ways as a sum of consecutive naturals, for example, 374713 + ... + 376535.

It is an arithmetic number, because the mean of its divisors is an integer number (15595200).

Almost surely, 2^684762552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 684762552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (998092800).

684762552 is an abundant number, since it is smaller than the sum of its proper divisors (1311423048).

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

684762552 is a wasteful number, since it uses less digits than its factorization.

684762552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922 (or 1912 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The square root of 684762552 is about 26167.9680525638. The cubic root of 684762552 is about 881.4141141162.

The spelling of 684762552 in words is "six hundred eighty-four million, seven hundred sixty-two thousand, five hundred fifty-two".