684809452 has 24 divisors (see below), whose sum is σ = 1252300896. Its totient is φ = 327051648.

The previous prime is 684809399. The next prime is 684809459. The reversal of 684809452 is 254908486.

684809452 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (684809459) 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, 64728 + ... + 74560.

It is an arithmetic number, because the mean of its divisors is an integer number (52179204).

Almost surely, 2^684809452 is an apocalyptic number.

It is an amenable number.

684809452 is a deficient number, since it is larger than the sum of its proper divisors (567491444).

684809452 is a wasteful number, since it uses less digits than its factorization.

684809452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10617 (or 10615 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 46.

The square root of 684809452 is about 26168.8641709953. The cubic root of 684809452 is about 881.4342366039.

The spelling of 684809452 in words is "six hundred eighty-four million, eight hundred nine thousand, four hundred fifty-two".