678263045 has 18 divisors (see below), whose sum is σ = 860411538. Its totient is φ = 513213408.

The previous prime is 678263017. The next prime is 678263051. The reversal of 678263045 is 540362876.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 106048804 + 572214241 = 10298^2 + 23921^2 .

It is not a de Polignac number, because 678263045 - 2⁸ = 678262789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 678262993 and 678263011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1106159 + ... + 1106771.

It is an arithmetic number, because the mean of its divisors is an integer number (47800641).

Almost surely, 2^678263045 is an apocalyptic number.

It is an amenable number.

678263045 is a deficient number, since it is larger than the sum of its proper divisors (182148493).

678263045 is an frugal number, since it uses more digits than its factorization.

678263045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269 (or 637 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 678263045 is about 26043.4837339401. The cubic root of 678263045 is about 878.6165611846.

The spelling of 678263045 in words is "six hundred seventy-eight million, two hundred sixty-three thousand, forty-five".