678289936 has 45 divisors (see below), whose sum is σ = 1399693741. Its totient is φ = 318361856.

The previous prime is 678289879. The next prime is 678289943. The reversal of 678289936 is 639982876.

The square root of 678289936 is 26044.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 528080400 + 150209536 = 22980^2 + 12256^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1770801 + ... + 1771183.

Almost surely, 2^678289936 is an apocalyptic number.

678289936 is the 26044-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678289936

678289936 is an abundant number, since it is smaller than the sum of its proper divisors (721403805).

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

678289936 is an equidigital number, since it uses as much as digits as its factorization.

678289936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808 (or 402 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 58.

The cubic root of 678289936 is about 878.6281724937.

The spelling of 678289936 in words is "six hundred seventy-eight million, two hundred eighty-nine thousand, nine hundred thirty-six".