678507252 has 24 divisors (see below), whose sum is σ = 1666509600. Its totient is φ = 214265376.

The previous prime is 678507241. The next prime is 678507283. The reversal of 678507252 is 252705876.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1487727 + ... + 1488182.

It is an arithmetic number, because the mean of its divisors is an integer number (69437900).

Almost surely, 2^678507252 is an apocalyptic number.

It is an amenable number.

678507252 is an abundant number, since it is smaller than the sum of its proper divisors (988002348).

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

678507252 is a wasteful number, since it uses less digits than its factorization.

678507252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2975935 (or 2975933 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 42.

The square root of 678507252 is about 26048.1717592617. The cubic root of 678507252 is about 878.7219964677.

The spelling of 678507252 in words is "six hundred seventy-eight million, five hundred seven thousand, two hundred fifty-two".