2720977728 has 112 divisors (see below), whose sum is σ = 8263981440. Its totient is φ = 773996544.

The previous prime is 2720977723. The next prime is 2720977729. The reversal of 2720977728 is 8277790272.

It is a tau number, because it is divible by the number of its divisors (112).

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2720977723) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 308808 + ... + 317496.

Almost surely, 2^2720977728 is an apocalyptic number.

2720977728 is a gapful number since it is divisible by the number (28) 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 2720977728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4131990720).

2720977728 is an abundant number, since it is smaller than the sum of its proper divisors (5543003712).

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

2720977728 is a wasteful number, since it uses less digits than its factorization.

2720977728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8944 (or 8934 counting only the distinct ones).

The product of its (nonzero) digits is 1382976, while the sum is 51.

The square root of 2720977728 is about 52162.9919387299. The cubic root of 2720977728 is about 1396.0736463037.

The spelling of 2720977728 in words is "two billion, seven hundred twenty million, nine hundred seventy-seven thousand, seven hundred twenty-eight".