2780749368 has 24 divisors (see below), whose sum is σ = 7531196400. Its totient is φ = 926916432.

The previous prime is 2780749333. The next prime is 2780749369. The reversal of 2780749368 is 8639470872.

2780749368 is a `hidden beast` number, since 278 + 0 + 7 + 4 + 9 + 368 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2780749369) 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 5 ways as a sum of consecutive naturals, for example, 19310688 + ... + 19310831.

It is an arithmetic number, because the mean of its divisors is an integer number (313799850).

Almost surely, 2^2780749368 is an apocalyptic number.

It is an amenable number.

2780749368 is an abundant number, since it is smaller than the sum of its proper divisors (4750447032).

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

2780749368 is a wasteful number, since it uses less digits than its factorization.

2780749368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38621531 (or 38621524 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The square root of 2780749368 is about 52732.8111141441. The cubic root of 2780749368 is about 1406.2221974474. Note that the first 3 decimals are identical.

The spelling of 2780749368 in words is "two billion, seven hundred eighty million, seven hundred forty-nine thousand, three hundred sixty-eight".