2861860 has 12 divisors (see below), whose sum is σ = 6009948. Its totient is φ = 1144736.

The previous prime is 2861851. The next prime is 2861861. The reversal of 2861860 is 681682.

2861860 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 527076 + 2334784 = 726^2 + 1528^2 .

It is not an unprimeable number, because it can be changed into a prime (2861861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71527 + ... + 71566.

It is an arithmetic number, because the mean of its divisors is an integer number (500829).

2^2861860 is an apocalyptic number.

2861860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2861860 is an abundant number, since it is smaller than the sum of its proper divisors (3148088).

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

2861860 is a wasteful number, since it uses less digits than its factorization.

2861860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143102 (or 143100 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 2861860 is about 1691.7032836760. The cubic root of 2861860 is about 141.9763896472.

It can be divided in two parts, 2861 and 860, that added together give a square (3721 = 61²).

The spelling of 2861860 in words is "two million, eight hundred sixty-one thousand, eight hundred sixty".