340242778 has 4 divisors (see below), whose sum is σ = 510364170. Its totient is φ = 170121388.

The previous prime is 340242751. The next prime is 340242797. The reversal of 340242778 is 877242043.

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

It can be written as a sum of positive squares in only one way, i.e., 295392969 + 44849809 = 17187^2 + 6697^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85060693 + ... + 85060696.

Almost surely, 2^340242778 is an apocalyptic number.

340242778 is a deficient number, since it is larger than the sum of its proper divisors (170121392).

340242778 is a wasteful number, since it uses less digits than its factorization.

340242778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170121391.

The product of its (nonzero) digits is 75264, while the sum is 37.

The square root of 340242778 is about 18445.6709826452. The cubic root of 340242778 is about 698.1192903454.

The spelling of 340242778 in words is "three hundred forty million, two hundred forty-two thousand, seven hundred seventy-eight".