684811332 has 36 divisors (see below), whose sum is σ = 1737970416. Its totient is φ = 227358000.

The previous prime is 684811313. The next prime is 684811333. The reversal of 684811332 is 233118486.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×684811332² = 937933120871228448, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (684811333) 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 11 ways as a sum of consecutive naturals, for example, 28858 + ... + 46929.

It is an arithmetic number, because the mean of its divisors is an integer number (48276956).

Almost surely, 2^684811332 is an apocalyptic number.

It is an amenable number.

684811332 is an abundant number, since it is smaller than the sum of its proper divisors (1053159084).

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

684811332 is a wasteful number, since it uses less digits than its factorization.

684811332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76048 (or 76043 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 684811332 is about 26168.9000915209. The cubic root of 684811332 is about 881.4350432005.

The spelling of 684811332 in words is "six hundred eighty-four million, eight hundred eleven thousand, three hundred thirty-two".