2856660 has 48 divisors (see below), whose sum is σ = 8176896. Its totient is φ = 744832.

The previous prime is 2856653. The next prime is 2856673. The reversal of 2856660 is 666582.

It is a congruent number.

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, 2314 + ... + 3326.

It is an arithmetic number, because the mean of its divisors is an integer number (170352).

2^2856660 is an apocalyptic number.

2856660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2856660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4088448).

2856660 is an abundant number, since it is smaller than the sum of its proper divisors (5320236).

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

2856660 is a wasteful number, since it uses less digits than its factorization.

2856660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072 (or 1070 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 2856660 is about 1690.1656723529. The cubic root of 2856660 is about 141.8903471401.

The spelling of 2856660 in words is "two million, eight hundred fifty-six thousand, six hundred sixty".