685602380 has 12 divisors (see below), whose sum is σ = 1439765040. Its totient is φ = 274240944.

The previous prime is 685602373. The next prime is 685602397. The reversal of 685602380 is 83206586.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17140040 + ... + 17140079.

It is an arithmetic number, because the mean of its divisors is an integer number (119980420).

Almost surely, 2^685602380 is an apocalyptic number.

It is an amenable number.

685602380 is an abundant number, since it is smaller than the sum of its proper divisors (754162660).

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

685602380 is a wasteful number, since it uses less digits than its factorization.

685602380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34280128 (or 34280126 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 685602380 is about 26184.0100061087. The cubic root of 685602380 is about 881.7743040999.

The spelling of 685602380 in words is "six hundred eighty-five million, six hundred two thousand, three hundred eighty".