345057520 has 20 divisors (see below), whose sum is σ = 802258920. Its totient is φ = 138022976.

The previous prime is 345057509. The next prime is 345057521. The reversal of 345057520 is 25750543.

345057520 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345057521) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2156530 + ... + 2156689.

It is an arithmetic number, because the mean of its divisors is an integer number (40112946).

Almost surely, 2^345057520 is an apocalyptic number.

It is an amenable number.

345057520 is an abundant number, since it is smaller than the sum of its proper divisors (457201400).

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

345057520 is a wasteful number, since it uses less digits than its factorization.

345057520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4313232 (or 4313226 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 31.

The square root of 345057520 is about 18575.7239428239. The cubic root of 345057520 is about 701.3968840650.

It can be divided in two parts, 34505 and 7520, that added together give a square (42025 = 205²).

The spelling of 345057520 in words is "three hundred forty-five million, fifty-seven thousand, five hundred twenty".