2190851868 has 24 divisors (see below), whose sum is σ = 5118761872. Its totient is φ = 729316224.

The previous prime is 2190851833. The next prime is 2190851869. The reversal of 2190851868 is 8681580912.

2190851868 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2190851869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111505 + ... + 129672.

Almost surely, 2^2190851868 is an apocalyptic number.

It is an amenable number.

2190851868 is an abundant number, since it is smaller than the sum of its proper divisors (2927910004).

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

2190851868 is a wasteful number, since it uses less digits than its factorization.

2190851868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241941 (or 241939 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 48.

The square root of 2190851868 is about 46806.5365947962. The cubic root of 2190851868 is about 1298.7862177605.

The spelling of 2190851868 in words is "two billion, one hundred ninety million, eight hundred fifty-one thousand, eight hundred sixty-eight".