2861356212 has 144 divisors (see below), whose sum is σ = 8781787840. Its totient is φ = 800331840.

The previous prime is 2861356177. The next prime is 2861356213. The reversal of 2861356212 is 2126531682.

2861356212 is a `hidden beast` number, since 2 + 86 + 1 + 3 + 562 + 12 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2861356213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 161463 + ... + 178305.

Almost surely, 2^2861356212 is an apocalyptic number.

2861356212 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 2861356212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4390893920).

2861356212 is an abundant number, since it is smaller than the sum of its proper divisors (5920431628).

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

2861356212 is a wasteful number, since it uses less digits than its factorization.

2861356212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16891 (or 16872 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 2861356212 is about 53491.6461889144. The cubic root of 2861356212 is about 1419.6805821256.

Adding to 2861356212 its reverse (2126531682), we get a palindrome (4987887894).

The spelling of 2861356212 in words is "two billion, eight hundred sixty-one million, three hundred fifty-six thousand, two hundred twelve".