685329408 has 66 divisors (see below), whose sum is σ = 1978900404. Its totient is φ = 228440064.

The previous prime is 685329397. The next prime is 685329409. The reversal of 685329408 is 804923586.

It is not an unprimeable number, because it can be changed into a prime (685329409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27966 + ... + 46397.

Almost surely, 2^685329408 is an apocalyptic number.

It is an amenable number.

685329408 is an abundant number, since it is smaller than the sum of its proper divisors (1293570996).

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

685329408 is a wasteful number, since it uses less digits than its factorization.

685329408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74389 (or 74368 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 685329408 is about 26178.7969165888. The cubic root of 685329408 is about 881.6572626707.

The spelling of 685329408 in words is "six hundred eighty-five million, three hundred twenty-nine thousand, four hundred eight".