2179742720 has 176 divisors, whose sum is σ = 5624173440. Its totient is φ = 807665664.

The previous prime is 2179742687. The next prime is 2179742723. The reversal of 2179742720 is 272479712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2179742723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6876002 + ... + 6876318.

Almost surely, 2^2179742720 is an apocalyptic number.

2179742720 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 2179742720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2812086720).

2179742720 is an abundant number, since it is smaller than the sum of its proper divisors (3444430720).

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

2179742720 is a wasteful number, since it uses less digits than its factorization.

2179742720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438 (or 420 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 41.

The square root of 2179742720 is about 46687.7148723302. The cubic root of 2179742720 is about 1296.5872459321.

The spelling of 2179742720 in words is "two billion, one hundred seventy-nine million, seven hundred forty-two thousand, seven hundred twenty".