2189581026 has 64 divisors (see below), whose sum is σ = 4729881600. Its totient is φ = 674150400.

The previous prime is 2189581021. The next prime is 2189581063. The reversal of 2189581026 is 6201859812.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2189581021) 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, 477786 + ... + 482346.

It is an arithmetic number, because the mean of its divisors is an integer number (73904400).

Almost surely, 2^2189581026 is an apocalyptic number.

2189581026 is an abundant number, since it is smaller than the sum of its proper divisors (2540300574).

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

2189581026 is a wasteful number, since it uses less digits than its factorization.

2189581026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4715.

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 2189581026 is about 46792.9591498550. The cubic root of 2189581026 is about 1298.5350412896.

The spelling of 2189581026 in words is "two billion, one hundred eighty-nine million, five hundred eighty-one thousand, twenty-six".