684452412 has 72 divisors (see below), whose sum is σ = 1985963616. Its totient is φ = 194701824.

The previous prime is 684452383. The next prime is 684452429. The reversal of 684452412 is 214254486.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52888 + ... + 64544.

It is an arithmetic number, because the mean of its divisors is an integer number (27582828).

Almost surely, 2^684452412 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 684452412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (992981808).

684452412 is an abundant number, since it is smaller than the sum of its proper divisors (1301511204).

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

684452412 is a wasteful number, since it uses less digits than its factorization.

684452412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11907 (or 11902 counting only the distinct ones).

The product of its digits is 61440, while the sum is 36.

The square root of 684452412 is about 26162.0414341083. The cubic root of 684452412 is about 881.2810251338.

The spelling of 684452412 in words is "six hundred eighty-four million, four hundred fifty-two thousand, four hundred twelve".