2189495490 has 128 divisors (see below), whose sum is σ = 6489649152. Its totient is φ = 460373760.

The previous prime is 2189495459. The next prime is 2189495527. The reversal of 2189495490 is 945949812.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 902419 + ... + 904841.

It is an arithmetic number, because the mean of its divisors is an integer number (50700384).

Almost surely, 2^2189495490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2189495490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3244824576).

2189495490 is an abundant number, since it is smaller than the sum of its proper divisors (4300153662).

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

2189495490 is a wasteful number, since it uses less digits than its factorization.

2189495490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2784.

The product of its (nonzero) digits is 933120, while the sum is 51.

The square root of 2189495490 is about 46792.0451572701. The cubic root of 2189495490 is about 1298.5181319755.

The spelling of 2189495490 in words is "two billion, one hundred eighty-nine million, four hundred ninety-five thousand, four hundred ninety".