342778 has 8 divisors (see below), whose sum is σ = 516672. Its totient is φ = 170556.

The previous prime is 342761. The next prime is 342791. The reversal of 342778 is 877243.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 501 + ... + 967.

It is an arithmetic number, because the mean of its divisors is an integer number (64584).

2³⁴²⁷⁷⁸ is an apocalyptic number.

342778 is a deficient number, since it is larger than the sum of its proper divisors (173894).

342778 is a wasteful number, since it uses less digits than its factorization.

342778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836.

The product of its digits is 9408, while the sum is 31.

The square root of 342778 is about 585.4724587886. The cubic root of 342778 is about 69.9848946998.

The spelling of 342778 in words is "three hundred forty-two thousand, seven hundred seventy-eight".