340978655 has 16 divisors (see below), whose sum is σ = 439879680. Its totient is φ = 252924192.

The previous prime is 340978633. The next prime is 340978663. The reversal of 340978655 is 556879043.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340978655 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33719 + ... + 42648.

It is an arithmetic number, because the mean of its divisors is an integer number (27492480).

Almost surely, 2^340978655 is an apocalyptic number.

340978655 is a deficient number, since it is larger than the sum of its proper divisors (98901025).

340978655 is a wasteful number, since it uses less digits than its factorization.

340978655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76438.

The product of its (nonzero) digits is 907200, while the sum is 47.

The square root of 340978655 is about 18465.6073552970. The cubic root of 340978655 is about 698.6222253490.

The spelling of 340978655 in words is "three hundred forty million, nine hundred seventy-eight thousand, six hundred fifty-five".