345330378 has 20 divisors (see below), whose sum is σ = 773796210. Its totient is φ = 115110072.

The previous prime is 345330343. The next prime is 345330431. The reversal of 345330378 is 873033543.

It is a happy number.

345330378 is a `hidden beast` number, since 345 + 3 + 303 + 7 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 276324129 + 69006249 = 16623^2 + 8307^2 .

It is a Curzon 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 9 ways as a sum of consecutive naturals, for example, 1065673 + ... + 1065996.

Almost surely, 2^345330378 is an apocalyptic number.

345330378 is an abundant number, since it is smaller than the sum of its proper divisors (428465832).

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

345330378 is a wasteful number, since it uses less digits than its factorization.

345330378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131683 (or 2131674 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 36.

The square root of 345330378 is about 18583.0669696904. The cubic root of 345330378 is about 701.5817144351.

The spelling of 345330378 in words is "three hundred forty-five million, three hundred thirty thousand, three hundred seventy-eight".