678243465 has 12 divisors (see below), whose sum is σ = 1175622084. Its totient is φ = 361729824.

The previous prime is 678243427. The next prime is 678243469. The reversal of 678243465 is 564342876.

It can be written as a sum of positive squares in 2 ways, for example, as 230159241 + 448084224 = 15171^2 + 21168^2 .

It is not a de Polignac number, because 678243465 - 2⁹ = 678242953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 15072077 = 678243465 / (6 + 7 + 8 + 2 + 4 + 3 + 4 + 6 + 5).

It is a zygodrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 678243465.

It is not an unprimeable number, because it can be changed into a prime (678243469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7535994 + ... + 7536083.

It is an arithmetic number, because the mean of its divisors is an integer number (97968507).

Almost surely, 2^678243465 is an apocalyptic number.

It is an amenable number.

678243465 is a deficient number, since it is larger than the sum of its proper divisors (497378619).

678243465 is a wasteful number, since it uses less digits than its factorization.

678243465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15072088 (or 15072085 counting only the distinct ones).

The product of its digits is 967680, while the sum is 45.

The square root of 678243465 is about 26043.1078214563. The cubic root of 678243465 is about 878.6081065110.

It can be divided in two parts, 67824 and 3465, that added together give a square (71289 = 267²).

The spelling of 678243465 in words is "six hundred seventy-eight million, two hundred forty-three thousand, four hundred sixty-five".