685792044 has 108 divisors (see below), whose sum is σ = 2081771328. Its totient is φ = 189604800.

The previous prime is 685792043. The next prime is 685792057. The reversal of 685792044 is 440297586.

It is a happy number.

It is a super-2 number, since 2×685792044² = 940621455227395872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (685792043) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 48414 + ... + 60954.

Almost surely, 2^685792044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685792044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1040885664).

685792044 is an abundant number, since it is smaller than the sum of its proper divisors (1395979284).

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

685792044 is a wasteful number, since it uses less digits than its factorization.

685792044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12596 (or 12584 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 685792044 is about 26187.6315080230. The cubic root of 685792044 is about 881.8556075041.

The spelling of 685792044 in words is "six hundred eighty-five million, seven hundred ninety-two thousand, forty-four".