340238978 has 4 divisors (see below), whose sum is σ = 510358470. Its totient is φ = 170119488.

The previous prime is 340238971. The next prime is 340238989. The reversal of 340238978 is 879832043.

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., 321377329 + 18861649 = 17927^2 + 4343^2 .

It is not an unprimeable number, because it can be changed into a prime (340238971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85059743 + ... + 85059746.

Almost surely, 2^340238978 is an apocalyptic number.

340238978 is a deficient number, since it is larger than the sum of its proper divisors (170119492).

340238978 is a wasteful number, since it uses less digits than its factorization.

340238978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170119491.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 340238978 is about 18445.5679771592. The cubic root of 340238978 is about 698.1166913549.

The spelling of 340238978 in words is "three hundred forty million, two hundred thirty-eight thousand, nine hundred seventy-eight".