2778510340 has 12 divisors (see below), whose sum is σ = 5834871756. Its totient is φ = 1111404128.

The previous prime is 2778510307. The next prime is 2778510341. The reversal of 2778510340 is 430158772.

It can be written as a sum of positive squares in 2 ways, for example, as 881733636 + 1896776704 = 29694^2 + 43552^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2778510340.

It is not an unprimeable number, because it can be changed into a prime (2778510341) 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 3 ways as a sum of consecutive naturals, for example, 69462739 + ... + 69462778.

It is an arithmetic number, because the mean of its divisors is an integer number (486239313).

Almost surely, 2^2778510340 is an apocalyptic number.

2778510340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2778510340 is an abundant number, since it is smaller than the sum of its proper divisors (3056361416).

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

2778510340 is a wasteful number, since it uses less digits than its factorization.

2778510340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138925526 (or 138925524 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 2778510340 is about 52711.5769067859. The cubic root of 2778510340 is about 1405.8446713563.

The spelling of 2778510340 in words is "two billion, seven hundred seventy-eight million, five hundred ten thousand, three hundred forty".