345209286 has 16 divisors (see below), whose sum is σ = 690629184. Its totient is φ = 115034664.

The previous prime is 345209261. The next prime is 345209287. The reversal of 345209286 is 682902543.

It is a happy number.

It is a super-2 number, since 2×345209286² = 238338902281259592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345209287) 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, 19585 + ... + 32771.

It is an arithmetic number, because the mean of its divisors is an integer number (43164324).

Almost surely, 2^345209286 is an apocalyptic number.

345209286 is an abundant number, since it is smaller than the sum of its proper divisors (345419898).

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

345209286 is a wasteful number, since it uses less digits than its factorization.

345209286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17555.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 345209286 is about 18579.8085566025. The cubic root of 345209286 is about 701.4997003501.

The spelling of 345209286 in words is "three hundred forty-five million, two hundred nine thousand, two hundred eighty-six".