685442430 has 24 divisors (see below), whose sum is σ = 1782150552. Its totient is φ = 182784624.

The previous prime is 685442419. The next prime is 685442477. The reversal of 685442430 is 34244586.

685442430 is a `hidden beast` number, since 68 + 544 + 24 + 30 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3807924 + ... + 3808103.

It is an arithmetic number, because the mean of its divisors is an integer number (74256273).

Almost surely, 2^685442430 is an apocalyptic number.

685442430 is an abundant number, since it is smaller than the sum of its proper divisors (1096708122).

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

685442430 is a wasteful number, since it uses less digits than its factorization.

685442430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7616040 (or 7616037 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

The square root of 685442430 is about 26180.9554829460. The cubic root of 685442430 is about 881.7057265621.

It can be divided in two parts, 6854 and 42430, that added together give a square (49284 = 222²).

The spelling of 685442430 in words is "six hundred eighty-five million, four hundred forty-two thousand, four hundred thirty".