345620220 has 48 divisors (see below), whose sum is σ = 1055714688. Its totient is φ = 83786560.

The previous prime is 345620207. The next prime is 345620221. The reversal of 345620220 is 22026543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345620221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261174 + ... + 262493.

It is an arithmetic number, because the mean of its divisors is an integer number (21994056).

Almost surely, 2^345620220 is an apocalyptic number.

345620220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

345620220 is an abundant number, since it is smaller than the sum of its proper divisors (710094468).

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

345620220 is a wasteful number, since it uses less digits than its factorization.

345620220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523690 (or 523688 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 345620220 is about 18590.8638852529. The cubic root of 345620220 is about 701.7779429317. Note that the first 3 decimals are identical.

Adding to 345620220 its reverse (22026543), we get a palindrome (367646763).

The spelling of 345620220 in words is "three hundred forty-five million, six hundred twenty thousand, two hundred twenty".