2188371856 has 40 divisors (see below), whose sum is σ = 4628052000. Its totient is φ = 994149120.

The previous prime is 2188371853. The next prime is 2188371859. The reversal of 2188371856 is 6581738812.

2188371856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2188371853) and next prime (2188371859).

It is not an unprimeable number, because it can be changed into a prime (2188371853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 578740 + ... + 582508.

It is an arithmetic number, because the mean of its divisors is an integer number (115701300).

Almost surely, 2^2188371856 is an apocalyptic number.

It is an amenable number.

2188371856 is an abundant number, since it is smaller than the sum of its proper divisors (2439680144).

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

2188371856 is a wasteful number, since it uses less digits than its factorization.

2188371856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7087 (or 7081 counting only the distinct ones).

The product of its digits is 645120, while the sum is 49.

The square root of 2188371856 is about 46780.0369388482. The cubic root of 2188371856 is about 1298.2959637799.

It can be divided in two parts, 21883 and 71856, that added together give a palindrome (93739).

The spelling of 2188371856 in words is "two billion, one hundred eighty-eight million, three hundred seventy-one thousand, eight hundred fifty-six".