340778656 has 24 divisors (see below), whose sum is σ = 671528340. Its totient is φ = 170231808.

The previous prime is 340778653. The next prime is 340778657. The reversal of 340778656 is 656877043.

It can be written as a sum of positive squares in 2 ways, for example, as 340771600 + 7056 = 18460^2 + 84^2 .

It is a super-2 number, since 2×340778656² = 232260184770332672, which contains 22 as substring.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (340778653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35280 + ... + 43888.

Almost surely, 2^340778656 is an apocalyptic number.

It is an amenable number.

340778656 is a deficient number, since it is larger than the sum of its proper divisors (330749684).

340778656 is a wasteful number, since it uses less digits than its factorization.

340778656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9856 (or 9848 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 46.

The square root of 340778656 is about 18460.1911149370. The cubic root of 340778656 is about 698.4856077325.

The spelling of 340778656 in words is "three hundred forty million, seven hundred seventy-eight thousand, six hundred fifty-six".