345229520 has 20 divisors (see below), whose sum is σ = 802658820. Its totient is φ = 138091776.

The previous prime is 345229519. The next prime is 345229567. The reversal of 345229520 is 25922543.

It can be written as a sum of positive squares in 2 ways, for example, as 105103504 + 240126016 = 10252^2 + 15496^2 .

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

It is a congruent number.

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, 2157605 + ... + 2157764.

It is an arithmetic number, because the mean of its divisors is an integer number (40132941).

Almost surely, 2^345229520 is an apocalyptic number.

It is an amenable number.

345229520 is an abundant number, since it is smaller than the sum of its proper divisors (457429300).

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

345229520 is a wasteful number, since it uses less digits than its factorization.

345229520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4315382 (or 4315376 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 345229520 is about 18580.3530644603. The cubic root of 345229520 is about 701.5134059177.

The spelling of 345229520 in words is "three hundred forty-five million, two hundred twenty-nine thousand, five hundred twenty".