678242271 has 12 divisors (see below), whose sum is σ = 1051967832. Its totient is φ = 387566928.

The previous prime is 678242267. The next prime is 678242287. The reversal of 678242271 is 172242876.

It is not a de Polignac number, because 678242271 - 2² = 678242267 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678242231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2306800 + ... + 2307093.

It is an arithmetic number, because the mean of its divisors is an integer number (87663986).

Almost surely, 2^678242271 is an apocalyptic number.

678242271 is a deficient number, since it is larger than the sum of its proper divisors (373725561).

678242271 is a wasteful number, since it uses less digits than its factorization.

678242271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4613910 (or 4613903 counting only the distinct ones).

The product of its digits is 75264, while the sum is 39.

The square root of 678242271 is about 26043.0848979148. The cubic root of 678242271 is about 878.6075909348.

The spelling of 678242271 in words is "six hundred seventy-eight million, two hundred forty-two thousand, two hundred seventy-one".