678987460 has 24 divisors (see below), whose sum is σ = 1428532056. Its totient is φ = 271088640.

The previous prime is 678987443. The next prime is 678987461. The reversal of 678987460 is 64789876.

It can be written as a sum of positive squares in 4 ways, for example, as 54287424 + 624700036 = 7368^2 + 24994^2 .

It is a super-2 number, since 2×678987460² = 922047941674503200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (678987461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20557 + ... + 42196.

It is an arithmetic number, because the mean of its divisors is an integer number (59522169).

Almost surely, 2^678987460 is an apocalyptic number.

It is an amenable number.

678987460 is an abundant number, since it is smaller than the sum of its proper divisors (749544596).

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

678987460 is a wasteful number, since it uses less digits than its factorization.

678987460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63303 (or 63301 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 55.

The square root of 678987460 is about 26057.3878199638. The cubic root of 678987460 is about 878.9292503680.

It can be divided in two parts, 6789 and 87460, that added together give a palindrome (94249).

The spelling of 678987460 in words is "six hundred seventy-eight million, nine hundred eighty-seven thousand, four hundred sixty".