2188801620 has 72 divisors (see below), whose sum is σ = 6643553280. Its totient is φ = 583312320.

The previous prime is 2188801619. The next prime is 2188801633. The reversal of 2188801620 is 261088812.

2188801620 is a `hidden beast` number, since 21 + 8 + 8 + 8 + 0 + 1 + 620 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 400305 + ... + 405735.

Almost surely, 2^2188801620 is an apocalyptic number.

2188801620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2188801620 is an abundant number, since it is smaller than the sum of its proper divisors (4454751660).

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

2188801620 is a wasteful number, since it uses less digits than its factorization.

2188801620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7685 (or 7680 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 2188801620 is about 46784.6301684645. The cubic root of 2188801620 is about 1298.3809469519.

The spelling of 2188801620 in words is "two billion, one hundred eighty-eight million, eight hundred one thousand, six hundred twenty".