2861320 has 64 divisors (see below), whose sum is σ = 8035200. Its totient is φ = 890880.

The previous prime is 2861317. The next prime is 2861347. The reversal of 2861320 is 231682.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 2861291 and 2861300.

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, 2616 + ... + 3544.

It is an arithmetic number, because the mean of its divisors is an integer number (125550).

2^2861320 is an apocalyptic number.

2861320 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 2861320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4017600).

2861320 is an abundant number, since it is smaller than the sum of its proper divisors (5173880).

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

2861320 is a wasteful number, since it uses less digits than its factorization.

2861320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958 (or 954 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 2861320 is about 1691.5436736898. The cubic root of 2861320 is about 141.9674593160.

The spelling of 2861320 in words is "two million, eight hundred sixty-one thousand, three hundred twenty".