2861892 has 90 divisors (see below), whose sum is σ = 8336174. Its totient is φ = 855360.

The previous prime is 2861869. The next prime is 2861897. The reversal of 2861892 is 2981682.

2861892 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2509056 + 352836 = 1584^2 + 594^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2861897) 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 29 ways as a sum of consecutive naturals, for example, 39168 + ... + 39240.

2^2861892 is an apocalyptic number.

2861892 is a gapful number since it is divisible by the number (22) 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 2861892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4168087).

2861892 is an abundant number, since it is smaller than the sum of its proper divisors (5474282).

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

2861892 is a wasteful number, since it uses less digits than its factorization.

2861892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111 (or 89 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 2861892 is about 1691.7127415729. The cubic root of 2861892 is about 141.9769188168.

2861892 divided by its sum of digits (36) gives a palindrome (79497).

The spelling of 2861892 in words is "two million, eight hundred sixty-one thousand, eight hundred ninety-two".