6851620 has 48 divisors (see below), whose sum is σ = 15257088. Its totient is φ = 2580480.

The previous prime is 6851617. The next prime is 6851639. The reversal of 6851620 is 261586.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26532 + ... + 26788.

It is an arithmetic number, because the mean of its divisors is an integer number (317856).

Almost surely, 2^6851620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6851620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7628544).

6851620 is an abundant number, since it is smaller than the sum of its proper divisors (8405468).

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

6851620 is a wasteful number, since it uses less digits than its factorization.

6851620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 6851620 is about 2617.5599324562. The cubic root of 6851620 is about 189.9318315010.

The spelling of 6851620 in words is "six million, eight hundred fifty-one thousand, six hundred twenty".