6786990 has 168 divisors, whose sum is σ = 22428360. Its totient is φ = 1469664.

The previous prime is 6786943. The next prime is 6787019. The reversal of 6786990 is 996876.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 357201 + ... + 357219.

Almost surely, 2^6786990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6786990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11214180).

6786990 is an abundant number, since it is smaller than the sum of its proper divisors (15641370).

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

6786990 is a wasteful number, since it uses less digits than its factorization.

6786990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 6786990 is about 2605.1852141451. The cubic root of 6786990 is about 189.3327471659.

It can be divided in two parts, 6786 and 990, that added together give a 5-th power (7776 = 6⁵).

The spelling of 6786990 in words is "six million, seven hundred eighty-six thousand, nine hundred ninety".