2190734885 has 4 divisors (see below), whose sum is σ = 2628881868. Its totient is φ = 1752587904.

The previous prime is 2190734881. The next prime is 2190734893. The reversal of 2190734885 is 5884370912.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1322195044 + 868539841 = 36362^2 + 29471^2 .

It is a cyclic number.

It is not a de Polignac number, because 2190734885 - 2² = 2190734881 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2190734881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219073484 + ... + 219073493.

It is an arithmetic number, because the mean of its divisors is an integer number (657220467).

Almost surely, 2^2190734885 is an apocalyptic number.

It is an amenable number.

2190734885 is a deficient number, since it is larger than the sum of its proper divisors (438146983).

2190734885 is an equidigital number, since it uses as much as digits as its factorization.

2190734885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438146982.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 2190734885 is about 46805.2869342770. The cubic root of 2190734885 is about 1298.7631006320.

The spelling of 2190734885 in words is "two billion, one hundred ninety million, seven hundred thirty-four thousand, eight hundred eighty-five".