345772220 has 24 divisors (see below), whose sum is σ = 751161600. Its totient is φ = 133539392.

The previous prime is 345772213. The next prime is 345772223. The reversal of 345772220 is 22277543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345772223) 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, 297500 + ... + 298659.

It is an arithmetic number, because the mean of its divisors is an integer number (31298400).

Almost surely, 2^345772220 is an apocalyptic number.

It is an amenable number.

345772220 is an abundant number, since it is smaller than the sum of its proper divisors (405389380).

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

345772220 is a wasteful number, since it uses less digits than its factorization.

345772220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596197 (or 596195 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 32.

The square root of 345772220 is about 18594.9514653844. The cubic root of 345772220 is about 701.8808059467.

The spelling of 345772220 in words is "three hundred forty-five million, seven hundred seventy-two thousand, two hundred twenty".