6861988 has 12 divisors (see below), whose sum is σ = 13724032. Its totient is φ = 2940840.

The previous prime is 6861977. The next prime is 6861997. The reversal of 6861988 is 8891686.

6861988 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122508 + ... + 122563.

Almost surely, 2^6861988 is an apocalyptic number.

It is an amenable number.

6861988 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

6861988 is a wasteful number, since it uses less digits than its factorization.

6861988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245082 (or 245080 counting only the distinct ones).

The product of its digits is 165888, while the sum is 46.

The square root of 6861988 is about 2619.5396542141. The cubic root of 6861988 is about 190.0275860223.

It can be divided in two parts, 686198 and 8, that added together give a triangular number (686206 = T₁₁₇₁).

The spelling of 6861988 in words is "six million, eight hundred sixty-one thousand, nine hundred eighty-eight".