345208840 has 32 divisors (see below), whose sum is σ = 810492480. Its totient is φ = 132079552.

The previous prime is 345208753. The next prime is 345208841. The reversal of 345208840 is 48802543.

It is a junction number, because it is equal to n+sod(n) for n = 345208796 and 345208805.

It is not an unprimeable number, because it can be changed into a prime (345208841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186694 + ... + 188533.

It is an arithmetic number, because the mean of its divisors is an integer number (25327890).

Almost surely, 2^345208840 is an apocalyptic number.

It is an amenable number.

345208840 is an abundant number, since it is smaller than the sum of its proper divisors (465283640).

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

345208840 is a wasteful number, since it uses less digits than its factorization.

345208840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375261 (or 375257 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 345208840 is about 18579.7965543221. The cubic root of 345208840 is about 701.4993982445.

The spelling of 345208840 in words is "three hundred forty-five million, two hundred eight thousand, eight hundred forty".