2194619640 has 64 divisors (see below), whose sum is σ = 6594752160. Its totient is φ = 584263680.

The previous prime is 2194619629. The next prime is 2194619663. The reversal of 2194619640 is 469164912.

It is a junction number, because it is equal to n+sod(n) for n = 2194619592 and 2194619601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59220 + ... + 88860.

Almost surely, 2^2194619640 is an apocalyptic number.

2194619640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2194619640 is an abundant number, since it is smaller than the sum of its proper divisors (4400132520).

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

2194619640 is a wasteful number, since it uses less digits than its factorization.

2194619640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30272 (or 30268 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 2194619640 is about 46846.7676579719. The cubic root of 2194619640 is about 1299.5303313230.

The spelling of 2194619640 in words is "two billion, one hundred ninety-four million, six hundred nineteen thousand, six hundred forty".