6867990 has 80 divisors (see below), whose sum is σ = 18905040. Its totient is φ = 1788480.

The previous prime is 6867989. The next prime is 6867997. The reversal of 6867990 is 997686.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6867997) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 49341 + ... + 49479.

It is an arithmetic number, because the mean of its divisors is an integer number (236313).

Almost surely, 2^6867990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6867990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9452520).

6867990 is an abundant number, since it is smaller than the sum of its proper divisors (12037050).

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

6867990 is a wasteful number, since it uses less digits than its factorization.

6867990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 210 counting only the distinct ones).

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

The square root of 6867990 is about 2620.6850249505. The cubic root of 6867990 is about 190.0829739166.

The spelling of 6867990 in words is "six million, eight hundred sixty-seven thousand, nine hundred ninety".