2194443990 has 48 divisors (see below), whose sum is σ = 5723973216. Its totient is φ = 583296000.

The previous prime is 2194443971. The next prime is 2194443991. The reversal of 2194443990 is 993444912.

2194443990 is a `hidden beast` number, since 219 + 4 + 44 + 399 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2194443991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11211 + ... + 67190.

It is an arithmetic number, because the mean of its divisors is an integer number (119249442).

Almost surely, 2^2194443990 is an apocalyptic number.

2194443990 is an abundant number, since it is smaller than the sum of its proper divisors (3529529226).

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

2194443990 is a wasteful number, since it uses less digits than its factorization.

2194443990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78725 (or 78722 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 2194443990 is about 46844.8928913281. The cubic root of 2194443990 is about 1299.4956603807.

The spelling of 2194443990 in words is "two billion, one hundred ninety-four million, four hundred forty-three thousand, nine hundred ninety".