684572112 has 120 divisors (see below), whose sum is σ = 2195544000. Its totient is φ = 195056640.

The previous prime is 684572089. The next prime is 684572117. The reversal of 684572112 is 211275486.

684572112 is a `hidden beast` number, since 6 + 84 + 572 + 1 + 1 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684572117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 502312 + ... + 503672.

It is an arithmetic number, because the mean of its divisors is an integer number (18296200).

Almost surely, 2^684572112 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 684572112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1097772000).

684572112 is an abundant number, since it is smaller than the sum of its proper divisors (1510971888).

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

684572112 is a wasteful number, since it uses less digits than its factorization.

684572112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1881 (or 1872 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 684572112 is about 26164.3289996132. The cubic root of 684572112 is about 881.3323962191.

The spelling of 684572112 in words is "six hundred eighty-four million, five hundred seventy-two thousand, one hundred twelve".