345814778 has 8 divisors (see below), whose sum is σ = 518839572. Its totient is φ = 172868256.

The previous prime is 345814757. The next prime is 345814783. The reversal of 345814778 is 877418543.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 264940729 + 80874049 = 16277^2 + 8993^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6875 + ... + 27182.

Almost surely, 2^345814778 is an apocalyptic number.

345814778 is a deficient number, since it is larger than the sum of its proper divisors (173024794).

345814778 is a wasteful number, since it uses less digits than its factorization.

345814778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39136.

The product of its digits is 752640, while the sum is 47.

The square root of 345814778 is about 18596.0957730380. The cubic root of 345814778 is about 701.9096008356.

The spelling of 345814778 in words is "three hundred forty-five million, eight hundred fourteen thousand, seven hundred seventy-eight".