345680920 has 32 divisors (see below), whose sum is σ = 837612720. Its totient is φ = 127635840.

The previous prime is 345680917. The next prime is 345680921. The reversal of 345680920 is 29086543.

It is a self number, because there is not a number n which added to its sum of digits gives 345680920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345680921) 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, 331866 + ... + 332905.

Almost surely, 2^345680920 is an apocalyptic number.

It is an amenable number.

345680920 is an abundant number, since it is smaller than the sum of its proper divisors (491931800).

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

345680920 is a wasteful number, since it uses less digits than its factorization.

345680920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664795 (or 664791 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 345680920 is about 18592.4963358878. The cubic root of 345680920 is about 701.8190240810.

The spelling of 345680920 in words is "three hundred forty-five million, six hundred eighty thousand, nine hundred twenty".