685013992 has 32 divisors (see below), whose sum is σ = 1456005600. Its totient is φ = 299519424.

The previous prime is 685013983. The next prime is 685013993. The reversal of 685013992 is 299310586.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (685013993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171358 + ... + 175309.

It is an arithmetic number, because the mean of its divisors is an integer number (45500175).

Almost surely, 2^685013992 is an apocalyptic number.

It is an amenable number.

685013992 is an abundant number, since it is smaller than the sum of its proper divisors (770991608).

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

685013992 is a wasteful number, since it uses less digits than its factorization.

685013992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346705 (or 346701 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 685013992 is about 26172.7719586596. The cubic root of 685013992 is about 881.5219839384.

The spelling of 685013992 in words is "six hundred eighty-five million, thirteen thousand, nine hundred ninety-two".