340644355 has 4 divisors (see below), whose sum is σ = 408773232. Its totient is φ = 272515480.

The previous prime is 340644307. The next prime is 340644371. The reversal of 340644355 is 553446043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 553446043 = 619 ⋅894097.

It is not a de Polignac number, because 340644355 - 2²¹ = 338547203 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 340644355.

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, 34064431 + ... + 34064440.

It is an arithmetic number, because the mean of its divisors is an integer number (102193308).

Almost surely, 2^340644355 is an apocalyptic number.

340644355 is a deficient number, since it is larger than the sum of its proper divisors (68128877).

340644355 is an equidigital number, since it uses as much as digits as its factorization.

340644355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68128876.

The product of its (nonzero) digits is 86400, while the sum is 34.

The square root of 340644355 is about 18456.5531722475. The cubic root of 340644355 is about 698.3938378600.

The spelling of 340644355 in words is "three hundred forty million, six hundred forty-four thousand, three hundred fifty-five".