685129092 has 48 divisors (see below), whose sum is σ = 1643906880. Its totient is φ = 221989248.

The previous prime is 685129091. The next prime is 685129097. The reversal of 685129092 is 290921586.

It is not an unprimeable number, because it can be changed into a prime (685129091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64383 + ... + 74265.

It is an arithmetic number, because the mean of its divisors is an integer number (34248060).

Almost surely, 2^685129092 is an apocalyptic number.

It is an amenable number.

685129092 is an abundant number, since it is smaller than the sum of its proper divisors (958777788).

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

685129092 is a wasteful number, since it uses less digits than its factorization.

685129092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10052 (or 10050 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 685129092 is about 26174.9707163160. The cubic root of 685129092 is about 881.5713539753.

The spelling of 685129092 in words is "six hundred eighty-five million, one hundred twenty-nine thousand, ninety-two".