678545226 has 12 divisors (see below), whose sum is σ = 1470181362. Its totient is φ = 226181736.

The previous prime is 678545221. The next prime is 678545279. The reversal of 678545226 is 622545876.

678545226 is a `hidden beast` number, since 6 + 78 + 54 + 522 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 442892025 + 235653201 = 21045^2 + 15351^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (678545221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18848461 + ... + 18848496.

Almost surely, 2^678545226 is an apocalyptic number.

678545226 is an abundant number, since it is smaller than the sum of its proper divisors (791636136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

678545226 is a wasteful number, since it uses less digits than its factorization.

678545226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37696965 (or 37696962 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The square root of 678545226 is about 26048.9006677825. The cubic root of 678545226 is about 878.7383892999.

The spelling of 678545226 in words is "six hundred seventy-eight million, five hundred forty-five thousand, two hundred twenty-six".