2779139290 has 8 divisors (see below), whose sum is σ = 5002450740. Its totient is φ = 1111655712.

The previous prime is 2779139257. The next prime is 2779139299. The reversal of 2779139290 is 929319772.

2779139290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2336078889 + 443060401 = 48333^2 + 21049^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2779139299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138956955 + ... + 138956974.

Almost surely, 2^2779139290 is an apocalyptic number.

2779139290 is a deficient number, since it is larger than the sum of its proper divisors (2223311450).

2779139290 is a wasteful number, since it uses less digits than its factorization.

2779139290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277913936.

The product of its (nonzero) digits is 428652, while the sum is 49.

The square root of 2779139290 is about 52717.5425261838. The cubic root of 2779139290 is about 1405.9507400993.

It can be divided in two parts, 27791 and 39290, that added together give a square (67081 = 259²).

The spelling of 2779139290 in words is "two billion, seven hundred seventy-nine million, one hundred thirty-nine thousand, two hundred ninety".