345221946 has 16 divisors (see below), whose sum is σ = 767160000. Its totient is φ = 115073964.

The previous prime is 345221923. The next prime is 345221971. The reversal of 345221946 is 649122543.

It is a happy number.

345221946 is a `hidden beast` number, since 345 + 221 + 94 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 345221946.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3196446 + ... + 3196553.

It is an arithmetic number, because the mean of its divisors is an integer number (47947500).

Almost surely, 2^345221946 is an apocalyptic number.

345221946 is an abundant number, since it is smaller than the sum of its proper divisors (421938054).

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

345221946 is a wasteful number, since it uses less digits than its factorization.

345221946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6393010 (or 6393004 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 345221946 is about 18580.1492459022. The cubic root of 345221946 is about 701.5082757062.

The spelling of 345221946 in words is "three hundred forty-five million, two hundred twenty-one thousand, nine hundred forty-six".