2187089388 has 72 divisors (see below), whose sum is σ = 6194107920. Its totient is φ = 644837760.

The previous prime is 2187089381. The next prime is 2187089407. The reversal of 2187089388 is 8839807812.

2187089388 is a `hidden beast` number, since 2 + 187 + 0 + 89 + 388 = 666.

It is a super-2 number, since 2×2187089388² = 9566719982204429088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2187089381) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59983 + ... + 89286.

Almost surely, 2^2187089388 is an apocalyptic number.

It is an amenable number.

2187089388 is an abundant number, since it is smaller than the sum of its proper divisors (4007018532).

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

2187089388 is a wasteful number, since it uses less digits than its factorization.

2187089388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149327 (or 149322 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 54.

The square root of 2187089388 is about 46766.3275017400. The cubic root of 2187089388 is about 1298.0422975082.

The spelling of 2187089388 in words is "two billion, one hundred eighty-seven million, eighty-nine thousand, three hundred eighty-eight".