684539472 has 20 divisors (see below), whose sum is σ = 1768393760. Its totient is φ = 228179808.

The previous prime is 684539447. The next prime is 684539473. The reversal of 684539472 is 274935486.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 14261239 = 684539472 / (6 + 8 + 4 + 5 + 3 + 9 + 4 + 7 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684539473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7130572 + ... + 7130667.

It is an arithmetic number, because the mean of its divisors is an integer number (88419688).

Almost surely, 2^684539472 is an apocalyptic number.

It is an amenable number.

684539472 is an abundant number, since it is smaller than the sum of its proper divisors (1083854288).

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

684539472 is a wasteful number, since it uses less digits than its factorization.

684539472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14261250 (or 14261244 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 48.

The square root of 684539472 is about 26163.7052421862. The cubic root of 684539472 is about 881.3183888579.

The spelling of 684539472 in words is "six hundred eighty-four million, five hundred thirty-nine thousand, four hundred seventy-two".