2190890887 has 4 divisors (see below), whose sum is σ = 2193361776. Its totient is φ = 2188420000.

The previous prime is 2190890873. The next prime is 2190890941. The reversal of 2190890887 is 7880980912.

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

It is a cyclic number.

It is not a de Polignac number, because 2190890887 - 2¹⁹ = 2190366599 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 (2190890087) 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, 1234114 + ... + 1235887.

It is an arithmetic number, because the mean of its divisors is an integer number (548340444).

Almost surely, 2^2190890887 is an apocalyptic number.

2190890887 is a deficient number, since it is larger than the sum of its proper divisors (2470889).

2190890887 is an equidigital number, since it uses as much as digits as its factorization.

2190890887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2470888.

The product of its (nonzero) digits is 580608, while the sum is 52.

The square root of 2190890887 is about 46806.9534043821. The cubic root of 2190890887 is about 1298.7939281614.

The spelling of 2190890887 in words is "two billion, one hundred ninety million, eight hundred ninety thousand, eight hundred eighty-seven".