2194388840 has 64 divisors (see below), whose sum is σ = 5658111360. Its totient is φ = 750309120.

The previous prime is 2194388701. The next prime is 2194388863. The reversal of 2194388840 is 488834912.

It is a happy number.

2194388840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2194388840² = 9630684762233091200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93935 + ... + 114945.

It is an arithmetic number, because the mean of its divisors is an integer number (88407990).

Almost surely, 2^2194388840 is an apocalyptic number.

2194388840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2194388840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2829055680).

2194388840 is an abundant number, since it is smaller than the sum of its proper divisors (3463722520).

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

2194388840 is a wasteful number, since it uses less digits than its factorization.

2194388840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21402 (or 21398 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 47.

The square root of 2194388840 is about 46844.3042428853. The cubic root of 2194388840 is about 1299.4847741325.

The spelling of 2194388840 in words is "two billion, one hundred ninety-four million, three hundred eighty-eight thousand, eight hundred forty".