345708278 has 4 divisors (see below), whose sum is σ = 518562420. Its totient is φ = 172854138.

The previous prime is 345708271. The next prime is 345708299. The reversal of 345708278 is 872807543.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345708271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86427068 + ... + 86427071.

It is an arithmetic number, because the mean of its divisors is an integer number (129640605).

Almost surely, 2^345708278 is an apocalyptic number.

345708278 is a deficient number, since it is larger than the sum of its proper divisors (172854142).

345708278 is a wasteful number, since it uses less digits than its factorization.

345708278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172854141.

The product of its (nonzero) digits is 376320, while the sum is 44.

The square root of 345708278 is about 18593.2320482481. The cubic root of 345708278 is about 701.8375381280.

The spelling of 345708278 in words is "three hundred forty-five million, seven hundred eight thousand, two hundred seventy-eight".