684144426 has 16 divisors (see below), whose sum is σ = 1563758784. Its totient is φ = 195469824.

The previous prime is 684144403. The next prime is 684144449. The reversal of 684144426 is 624441486.

684144426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (684144403) and next prime (684144449).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8144535 + ... + 8144618.

It is an arithmetic number, because the mean of its divisors is an integer number (97734924).

Almost surely, 2^684144426 is an apocalyptic number.

684144426 is an abundant number, since it is smaller than the sum of its proper divisors (879614358).

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

684144426 is a wasteful number, since it uses less digits than its factorization.

684144426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16289165.

The product of its digits is 147456, while the sum is 39.

The square root of 684144426 is about 26156.1546485717. The cubic root of 684144426 is about 881.1488206960.

The spelling of 684144426 in words is "six hundred eighty-four million, one hundred forty-four thousand, four hundred twenty-six".