6855988 has 6 divisors (see below), whose sum is σ = 11997986. Its totient is φ = 3427992.

The previous prime is 6855971. The next prime is 6856009. The reversal of 6855988 is 8895586.

It can be written as a sum of positive squares in only one way, i.e., 6260004 + 595984 = 2502^2 + 772^2 .

It is a super-3 number, since 3×6855988³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 856995 + ... + 857002.

Almost surely, 2^6855988 is an apocalyptic number.

It is an amenable number.

6855988 is a deficient number, since it is larger than the sum of its proper divisors (5141998).

6855988 is a wasteful number, since it uses less digits than its factorization.

6855988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714001 (or 1713999 counting only the distinct ones).

The product of its digits is 691200, while the sum is 49.

The square root of 6855988 is about 2618.3941643687. The cubic root of 6855988 is about 189.9721842937.

The spelling of 6855988 in words is "six million, eight hundred fifty-five thousand, nine hundred eighty-eight".