2194869864 has 64 divisors (see below), whose sum is σ = 6338139840. Its totient is φ = 625986560.

The previous prime is 2194869841. The next prime is 2194869869. The reversal of 2194869864 is 4689684912.

It is not an unprimeable number, because it can be changed into a prime (2194869869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240039 + ... + 249014.

It is an arithmetic number, because the mean of its divisors is an integer number (99033435).

Almost surely, 2^2194869864 is an apocalyptic number.

2194869864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2194869864 is an abundant number, since it is smaller than the sum of its proper divisors (4143269976).

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

2194869864 is a wasteful number, since it uses less digits than its factorization.

2194869864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489090 (or 489086 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 57.

The square root of 2194869864 is about 46849.4382463653. The cubic root of 2194869864 is about 1299.5797189730.

The spelling of 2194869864 in words is "two billion, one hundred ninety-four million, eight hundred sixty-nine thousand, eight hundred sixty-four".