345216906 has 24 divisors (see below), whose sum is σ = 760649760. Its totient is φ = 113121576.

The previous prime is 345216881. The next prime is 345216917. The reversal of 345216906 is 609612543.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161470 + ... + 163593.

It is an arithmetic number, because the mean of its divisors is an integer number (31693740).

Almost surely, 2^345216906 is an apocalyptic number.

345216906 is an abundant number, since it is smaller than the sum of its proper divisors (415432854).

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

345216906 is a wasteful number, since it uses less digits than its factorization.

345216906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325130 (or 325127 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 345216906 is about 18580.0136167873. The cubic root of 345216906 is about 701.5048618454.

The spelling of 345216906 in words is "three hundred forty-five million, two hundred sixteen thousand, nine hundred six".