685507722 has 32 divisors (see below), whose sum is σ = 1385078400. Its totient is φ = 226169088.

The previous prime is 685507721. The next prime is 685507729. The reversal of 685507722 is 227705586.

It is not an unprimeable number, because it can be changed into a prime (685507721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 335179 + ... + 337217.

It is an arithmetic number, because the mean of its divisors is an integer number (43283700).

Almost surely, 2^685507722 is an apocalyptic number.

685507722 is an abundant number, since it is smaller than the sum of its proper divisors (699570678).

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

685507722 is a wasteful number, since it uses less digits than its factorization.

685507722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2590.

The product of its (nonzero) digits is 235200, while the sum is 42.

The square root of 685507722 is about 26182.2023901734. The cubic root of 685507722 is about 881.7337213773.

The spelling of 685507722 in words is "six hundred eighty-five million, five hundred seven thousand, seven hundred twenty-two".