2187090444 has 96 divisors (see below), whose sum is σ = 6382559232. Its totient is φ = 566280000.

The previous prime is 2187090427. The next prime is 2187090449. The reversal of 2187090444 is 4440907812.

It is a super-2 number, since 2×2187090444² = 9566729220472234272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2187090449) 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, 302269 + ... + 309419.

It is an arithmetic number, because the mean of its divisors is an integer number (66484992).

Almost surely, 2^2187090444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2187090444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3191279616).

2187090444 is an abundant number, since it is smaller than the sum of its proper divisors (4195468788).

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

2187090444 is a wasteful number, since it uses less digits than its factorization.

2187090444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7507 (or 7505 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 2187090444 is about 46766.3387919131. The cubic root of 2187090444 is about 1298.0425064210.

The spelling of 2187090444 in words is "two billion, one hundred eighty-seven million, ninety thousand, four hundred forty-four".