685058406 has 16 divisors (see below), whose sum is σ = 1375804848. Its totient is φ = 227404800.

The previous prime is 685058389. The next prime is 685058419. The reversal of 685058406 is 604850586.

It is a congruent number.

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, 235435 + ... + 238326.

It is an arithmetic number, because the mean of its divisors is an integer number (85987803).

Almost surely, 2^685058406 is an apocalyptic number.

685058406 is an abundant number, since it is smaller than the sum of its proper divisors (690746442).

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

685058406 is a wasteful number, since it uses less digits than its factorization.

685058406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474007.

The product of its (nonzero) digits is 230400, while the sum is 42.

The square root of 685058406 is about 26173.6204220967. The cubic root of 685058406 is about 881.5410351655.

It can be divided in two parts, 6850 and 58406, that added together give a palindrome (65256).

The spelling of 685058406 in words is "six hundred eighty-five million, fifty-eight thousand, four hundred six".