6989778 has 24 divisors (see below), whose sum is σ = 15193308. Its totient is φ = 2322432.

The previous prime is 6989761. The next prime is 6989791. The reversal of 6989778 is 8779896.

It can be written as a sum of positive squares in 2 ways, for example, as 6517809 + 471969 = 2553^2 + 687^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10050 + ... + 10722.

Almost surely, 2^6989778 is an apocalyptic number.

6989778 is an abundant number, since it is smaller than the sum of its proper divisors (8203530).

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

6989778 is a wasteful number, since it uses less digits than its factorization.

6989778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258 (or 1255 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The square root of 6989778 is about 2643.8188288913. The cubic root of 6989778 is about 191.1999587134.

The spelling of 6989778 in words is "six million, nine hundred eighty-nine thousand, seven hundred seventy-eight".