2668189440 has 288 divisors, whose sum is σ = 10313533440. Its totient is φ = 573898752.

The previous prime is 2668189429. The next prime is 2668189501. The reversal of 2668189440 is 449818662.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 2668189440.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 454041 + ... + 459879.

It is an arithmetic number, because the mean of its divisors is an integer number (35810880).

Almost surely, 2^2668189440 is an apocalyptic number.

2668189440 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 2668189440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5156766720).

2668189440 is an abundant number, since it is smaller than the sum of its proper divisors (7645344000).

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

2668189440 is a wasteful number, since it uses less digits than its factorization.

2668189440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5887 (or 5873 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 48.

The square root of 2668189440 is about 51654.5200345526. The cubic root of 2668189440 is about 1386.9864564884.

The spelling of 2668189440 in words is "two billion, six hundred sixty-eight million, one hundred eighty-nine thousand, four hundred forty".