684424356 has 72 divisors (see below), whose sum is σ = 2026626336. Its totient is φ = 177770880.

The previous prime is 684424339. The next prime is 684424361. The reversal of 684424356 is 653424486.

684424356 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 (42).

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, 46441 + ... + 59376.

It is an arithmetic number, because the mean of its divisors is an integer number (28147588).

Almost surely, 2^684424356 is an apocalyptic number.

684424356 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

684424356 is an abundant number, since it is smaller than the sum of its proper divisors (1342201980).

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

684424356 is a wasteful number, since it uses less digits than its factorization.

684424356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105849 (or 105840 counting only the distinct ones).

The product of its digits is 552960, while the sum is 42.

The square root of 684424356 is about 26161.5052319243. The cubic root of 684424356 is about 881.2689836059.

The spelling of 684424356 in words is "six hundred eighty-four million, four hundred twenty-four thousand, three hundred fifty-six".