685400342 has 32 divisors (see below), whose sum is σ = 1156944384. Its totient is φ = 301852000.

The previous prime is 685400329. The next prime is 685400369. The reversal of 685400342 is 243004586.

It is a junction number, because it is equal to n+sod(n) for n = 685400299 and 685400308.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101153 + ... + 107715.

It is an arithmetic number, because the mean of its divisors is an integer number (36154512).

Almost surely, 2^685400342 is an apocalyptic number.

685400342 is a deficient number, since it is larger than the sum of its proper divisors (471544042).

685400342 is a wasteful number, since it uses less digits than its factorization.

685400342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6724.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 685400342 is about 26180.1516802329. The cubic root of 685400342 is about 881.6876798288.

The spelling of 685400342 in words is "six hundred eighty-five million, four hundred thousand, three hundred forty-two".