345520520 has 32 divisors (see below), whose sum is σ = 790603200. Its totient is φ = 135864768.

The previous prime is 345520477. The next prime is 345520537. The reversal of 345520520 is 25025543.

It is a self number, because there is not a number n which added to its sum of digits gives 345520520.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70844 + ... + 75563.

It is an arithmetic number, because the mean of its divisors is an integer number (24706350).

Almost surely, 2^345520520 is an apocalyptic number.

It is an amenable number.

345520520 is an abundant number, since it is smaller than the sum of its proper divisors (445082680).

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

345520520 is a wasteful number, since it uses less digits than its factorization.

345520520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146477 (or 146473 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 345520520 is about 18588.1822672364. The cubic root of 345520520 is about 701.7104565350.

The spelling of 345520520 in words is "three hundred forty-five million, five hundred twenty thousand, five hundred twenty".