2187293836 has 96 divisors (see below), whose sum is σ = 4997680128. Its totient is φ = 813922560.

The previous prime is 2187293833. The next prime is 2187293839. The reversal of 2187293836 is 6383927812.

It is an interprime number because it is at equal distance from previous prime (2187293833) and next prime (2187293839).

It is a self number, because there is not a number n which added to its sum of digits gives 2187293836.

It is not an unprimeable number, because it can be changed into a prime (2187293833) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 508551 + ... + 512833.

It is an arithmetic number, because the mean of its divisors is an integer number (52059168).

Almost surely, 2^2187293836 is an apocalyptic number.

2187293836 is a gapful number since it is divisible by the number (26) 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 2187293836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2498840064).

2187293836 is an abundant number, since it is smaller than the sum of its proper divisors (2810386292).

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

2187293836 is a wasteful number, since it uses less digits than its factorization.

2187293836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4391 (or 4389 counting only the distinct ones).

The product of its digits is 870912, while the sum is 49.

The square root of 2187293836 is about 46768.5132968753. The cubic root of 2187293836 is about 1298.0827430252.

The spelling of 2187293836 in words is "two billion, one hundred eighty-seven million, two hundred ninety-three thousand, eight hundred thirty-six".