340394458 has 4 divisors (see below), whose sum is σ = 510591690. Its totient is φ = 170197228.

The previous prime is 340394449. The next prime is 340394479. The reversal of 340394458 is 854493043.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 854493043 = 6619 ⋅129097.

It can be written as a sum of positive squares in only one way, i.e., 298494729 + 41899729 = 17277^2 + 6473^2 .

It is a super-2 number, since 2×340394458² = 231736774074227528, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 340394458.

It is an unprimeable number.

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, 85098613 + ... + 85098616.

Almost surely, 2^340394458 is an apocalyptic number.

340394458 is a deficient number, since it is larger than the sum of its proper divisors (170197232).

340394458 is a wasteful number, since it uses less digits than its factorization.

340394458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170197231.

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 340394458 is about 18449.7820583334. The cubic root of 340394458 is about 698.2230153023.

The spelling of 340394458 in words is "three hundred forty million, three hundred ninety-four thousand, four hundred fifty-eight".