345531606 has 64 divisors (see below), whose sum is σ = 836075520. Its totient is φ = 92996640.

The previous prime is 345531577. The next prime is 345531619. The reversal of 345531606 is 606135543.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 151285 + ... + 153551.

It is an arithmetic number, because the mean of its divisors is an integer number (13063680).

Almost surely, 2^345531606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 345531606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (418037760).

345531606 is an abundant number, since it is smaller than the sum of its proper divisors (490543914).

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

345531606 is a wasteful number, since it uses less digits than its factorization.

345531606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2489.

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 345531606 is about 18588.4804650622. The cubic root of 345531606 is about 701.7179612306.

The spelling of 345531606 in words is "three hundred forty-five million, five hundred thirty-one thousand, six hundred six".