684772 has 24 divisors (see below), whose sum is σ = 1330560. Its totient is φ = 305760.

The previous prime is 684769. The next prime is 684773. The reversal of 684772 is 277486.

684772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (684773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3378 + ... + 3574.

It is an arithmetic number, because the mean of its divisors is an integer number (55440).

2⁶⁸⁴⁷⁷² is an apocalyptic number.

It is an amenable number.

684772 is a deficient number, since it is larger than the sum of its proper divisors (645788).

684772 is a wasteful number, since it uses less digits than its factorization.

684772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 289 counting only the distinct ones).

The product of its digits is 18816, while the sum is 34.

The square root of 684772 is about 827.5095165616. The cubic root of 684772 is about 88.1418167863.

The spelling of 684772 in words is "six hundred eighty-four thousand, seven hundred seventy-two".