2749351820 has 12 divisors (see below), whose sum is σ = 5773638864. Its totient is φ = 1099740720.

The previous prime is 2749351789. The next prime is 2749351823. The reversal of 2749351820 is 281539472.

It is not an unprimeable number, because it can be changed into a prime (2749351823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68733776 + ... + 68733815.

It is an arithmetic number, because the mean of its divisors is an integer number (481136572).

Almost surely, 2^2749351820 is an apocalyptic number.

2749351820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2749351820 is an abundant number, since it is smaller than the sum of its proper divisors (3024287044).

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

2749351820 is a wasteful number, since it uses less digits than its factorization.

2749351820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137467600 (or 137467598 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 2749351820 is about 52434.2618904853. The cubic root of 2749351820 is about 1400.9095823842.

The spelling of 2749351820 in words is "two billion, seven hundred forty-nine million, three hundred fifty-one thousand, eight hundred twenty".