684543156 has 48 divisors (see below), whose sum is σ = 1779563520. Its totient is φ = 203021920.

The previous prime is 684543151. The next prime is 684543157. The reversal of 684543156 is 651345486.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684543151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48966 + ... + 61373.

It is an arithmetic number, because the mean of its divisors is an integer number (37074240).

Almost surely, 2^684543156 is an apocalyptic number.

684543156 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

684543156 is an abundant number, since it is smaller than the sum of its proper divisors (1095020364).

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

684543156 is a wasteful number, since it uses less digits than its factorization.

684543156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110404 (or 110402 counting only the distinct ones).

The product of its digits is 345600, while the sum is 42.

The square root of 684543156 is about 26163.7756449638. The cubic root of 684543156 is about 881.3199698581.

The spelling of 684543156 in words is "six hundred eighty-four million, five hundred forty-three thousand, one hundred fifty-six".