678049252 has 6 divisors (see below), whose sum is σ = 1186586198. Its totient is φ = 339024624.

The previous prime is 678049249. The next prime is 678049279. The reversal of 678049252 is 252940876.

It can be written as a sum of positive squares in only one way, i.e., 667395556 + 10653696 = 25834^2 + 3264^2 .

It is a junction number, because it is equal to n+sod(n) for n = 678049199 and 678049208.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84756153 + ... + 84756160.

Almost surely, 2^678049252 is an apocalyptic number.

It is an amenable number.

678049252 is a deficient number, since it is larger than the sum of its proper divisors (508536946).

678049252 is a wasteful number, since it uses less digits than its factorization.

678049252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169512317 (or 169512315 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 678049252 is about 26039.3788712404. The cubic root of 678049252 is about 878.5242362320.

The spelling of 678049252 in words is "six hundred seventy-eight million, forty-nine thousand, two hundred fifty-two".